Projects in Awesome Lists tagged with realtime

https://github.com/supabase/supabase

The open source Firebase alternative. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

ai alternative auth database deno embeddings example firebase nextjs oauth2 pgvector postgis postgres postgresql postgrest realtime supabase vectors websockets

Last synced: 12 May 2025

https://github.com/hacksider/deep-live-cam

real time face swap and one-click video deepfake with only a single image

ai ai-deep-fake ai-face ai-webcam artificial-intelligence deep-fake deepfake deepfake-webcam faceswap fake-webcam gan real-time-deepfake realtime realtime-deepfake realtime-face-changer video-deepfake webcam webcamera

Last synced: 09 Sep 2025

https://github.com/pocketbase/pocketbase

Open Source realtime backend in 1 file

authentication backend golang realtime

Last synced: 12 May 2025

https://github.com/meteor/meteor

Meteor, the JavaScript App Platform

build-system framework hacktoberfest hacktoberfest2023 javascript meteor mongodb nodejs npm react reactive-programming realtime rpc zero-configuration

Last synced: 12 May 2025

https://github.com/hacksider/Deep-Live-Cam

real time face swap and one-click video deepfake with only a single image

ai ai-deep-fake ai-face ai-webcam artificial-intelligence deep-fake deepfake deepfake-webcam faceswap fake-webcam gan real-time-deepfake realtime realtime-deepfake realtime-face-changer video-deepfake webcam webcamera

Last synced: 23 Jul 2025

https://github.com/blakeblackshear/frigate

NVR with realtime local object detection for IP cameras

ai camera google-coral home-assistant home-automation homeautomation mqtt nvr object-detection realtime rtsp tensorflow

Last synced: 13 May 2025

https://github.com/pubkey/rxdb

A fast, local first, reactive Database for JavaScript Applications https://rxdb.info/

angular browser-database couchdb crdt database firebase graphql indexeddb ionic local-first localstorage nodejs nosql pouchdb react-native realtime realtime-database rxdb rxjs sqlite

Last synced: 12 May 2025

https://github.com/phoenixframework/phoenix

Peace of mind from prototype to production

api-server distributed elixir realtime web-framework

Last synced: 12 May 2025

https://github.com/yjs/yjs

Shared data types for building collaborative software

collaboration collaborative-editing crdt decentralized offline-first p2p peer-to-peer realtime shared-editing yjs

Last synced: 17 Dec 2025

https://github.com/dianping/cat

CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。

apm distributed java metrics monitoring realtime tracing

Last synced: 12 May 2025

https://github.com/hellozeronet/zeronet

ZeroNet - Decentralized websites using Bitcoin crypto and BitTorrent network

anonymity anticensorship bitcoin bittorrent decentralized internet-freedom p2p python realtime tor torrent web

Last synced: 13 May 2025

https://github.com/amark/gun

An open source cybersecurity protocol for syncing decentralized graph data.

artificial-intelligence big-data blockchain crdt crypto cryptography dapp database decentralized dweb encryption end-to-end graph machine-learning metaverse offline-first p2p protocol realtime web3

Last synced: 12 May 2025

https://github.com/HelloZeroNet/ZeroNet

ZeroNet - Decentralized websites using Bitcoin crypto and BitTorrent network

anonymity anticensorship bitcoin bittorrent decentralized internet-freedom p2p python realtime tor torrent web

Last synced: 13 Mar 2025

https://github.com/teableio/teable

✨ The Next Gen Airtable Alternative: No-Code Postgres

airtable airtable-alternative app-builder database internal-tool low-code no-code nocode postgres postgresql realtime spreadsheet sqlite

Last synced: 12 May 2025

https://github.com/nvlabs/instant-ngp

Instant neural graphics primitives: lightning fast NeRF and more

3d-reconstruction computer-graphics computer-vision cuda function-approximation machine-learning nerf neural-network real-time real-time-rendering realtime signed-distance-functions

Last synced: 12 May 2025

https://github.com/realm/realm-swift

Realm is a mobile database: a replacement for Core Data & SQLite

database ios mobile mobile-database objective-c realtime swift sync threadsafe

Last synced: 11 Dec 2025

https://github.com/NVlabs/instant-ngp

Instant neural graphics primitives: lightning fast NeRF and more

3d-reconstruction computer-graphics computer-vision cuda function-approximation machine-learning nerf neural-network real-time real-time-rendering realtime signed-distance-functions

Last synced: 24 Mar 2025

https://nvlabs.github.io/instant-ngp/

Instant neural graphics primitives: lightning fast NeRF and more

3d-reconstruction computer-graphics computer-vision cuda function-approximation machine-learning nerf neural-network real-time real-time-rendering realtime signed-distance-functions

Last synced: 20 Mar 2025

https://github.com/winsiderss/systeminformer

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals.com

administrator benchmarking debugger monitor monitor-performance monitoring performance performance-monitoring performance-tuning process-manager process-monitor processhacker profiling realtime security system-monitor systeminformer task-manager windows

Last synced: 14 May 2025

https://github.com/redpanda-data/redpanda

Redpanda is a streaming data platform for developers. Kafka API compatible. 10x faster. No ZooKeeper. No JVM!

containers cpp event-driven go kafka kubernetes microservices realtime redpanda seastar storage-engine stream-processing streaming

Last synced: 26 Dec 2025

https://github.com/heroiclabs/nakama

Distributed server for social and realtime games and apps.

backend backend-as-a-service chat-server game-backend game-framework game-server multiplayer nakama realtime realtime-games social unity-engine unreal-engine

Last synced: 09 Sep 2025

https://github.com/hackmdio/codimd

CodiMD - Realtime collaborative markdown notes on all platforms.

codimd collaboration hackmd markdown notes realtime

Last synced: 16 May 2025

https://github.com/voicepaw/so-vits-svc-fork

so-vits-svc fork with realtime support, improved interface and more features.

contentvec deep-learning gan hacktoberfest hubert lightning pytorch pytorch-lightning realtime so-vits-svc softvc sovits speech-synthesis vits voice-changer voice-conversion

Last synced: 11 May 2025

https://github.com/mvig-sjtu/alphapose

Real-Time and Accurate Full-Body Multi-Person Pose Estimation&Tracking System

accurate alpha-pose alphapose crowdpose full-body gpu human-computer-interaction human-joints human-pose-estimation human-pose-tracking human-tracking keypoints person-pose-estimation pose-estimation posetracking pytorch realtime skeleton tracking whole-body

Last synced: 25 Apr 2025

https://github.com/MVIG-SJTU/AlphaPose

Real-Time and Accurate Full-Body Multi-Person Pose Estimation&Tracking System

accurate alpha-pose alphapose crowdpose full-body gpu human-computer-interaction human-joints human-pose-estimation human-pose-tracking human-tracking keypoints person-pose-estimation pose-estimation posetracking pytorch realtime skeleton tracking whole-body

Last synced: 07 Apr 2025

https://github.com/angular/angularfire

Angular + Firebase = ❤️

angular angularfire cloud-firestore cloud-functions firebase ngrx notifications offline-data realtime realtime-database rxjs

Last synced: 09 Sep 2025

https://github.com/deepstreamio/deepstream.io

deepstream.io server

authentication datasync deepstream permissions pubsub realtime rpc typescript websocket

Last synced: 16 Dec 2025

https://github.com/deepstreamIO/deepstream.io

deepstream.io server

authentication datasync deepstream permissions pubsub realtime rpc typescript websocket

Last synced: 14 Mar 2025

https://github.com/supabase/realtime

Broadcast, Presence, and Postgres Changes via WebSockets

cdc change-data-capture crdt distributed-systems elixir phoenix phoenix-framework postgres postgresql pubsub realtime

Last synced: 05 Jan 2026

https://github.com/koljab/realtimestt

A robust, efficient, low-latency speech-to-text library with advanced voice activity detection, wake word activation and instant transcription.

python realtime speech-to-text

Last synced: 14 May 2025

https://github.com/ntop/ntopng

Web-based Traffic and Security Network Traffic Monitoring

docker ebpf ipfix kubernetes netflow network ntopng packet-analyser packet-processing realtime sflow snmp traffic-monitoring

Last synced: 14 May 2025

https://github.com/KoljaB/RealtimeSTT

A robust, efficient, low-latency speech-to-text library with advanced voice activity detection, wake word activation and instant transcription.

python realtime speech-to-text

Last synced: 05 Apr 2025

https://github.com/socketcluster/socketcluster

Highly scalable realtime pub/sub and RPC framework

docker framework javascript kubernetes nodejs pubsub realtime scalable socketcluster websocket websockets

Last synced: 14 May 2025

https://github.com/SocketCluster/socketcluster

Highly scalable realtime pub/sub and RPC framework

docker framework javascript kubernetes nodejs pubsub realtime scalable socketcluster websocket websockets

Last synced: 23 Mar 2025

https://github.com/dooy/chatgpt-web-midjourney-proxy

One UI is all done with chatgpt web, midjourney, gpts,suno,luma,runway,viggle,flux,ideogram,realtime,pika,udio; Simultaneous support Web / PWA / Linux / Win / MacOS platform

chatgpt-ui claude-3 flux gpts gpts-ui gptstore ideogram kling luma midjourney midjourney-ui pika realtime runway suno udio viggle vision whisper-ui

Last synced: 23 Apr 2025

https://github.com/TEN-framework/ten-framework

The world’s first real-time, distributed, cloud-edge collaborative multimodal AI Agent Framework that simultaneously supports C/C++/Go/Python/JS/TS

agents ai audio-video cloud-edge-computing cpp cross-platform go golang javascript llm low-latency multimodal package-management python realtime rust typescript vision voice-assistant

Last synced: 03 May 2025

https://github.com/sanity-io/sanity

Sanity Studio – Rapidly configure content workspaces powered by structured content

cms headless react reactjs real-time realtime

Last synced: 12 May 2025

https://github.com/lipku/livetalking

Real time interactive streaming digital human

aigc digihuman digital-human er-nerf lip-sync metahuman-stream musetalk nerf realtime streaming talking-head virtualhumans wav2lip

Last synced: 13 May 2025

https://github.com/ten-framework/ten-agent

TEN Agent is a conversational voice AI agent powered by TEN, integrating Deepseek, Gemini, OpenAI, RTC, and hardware like ESP32. It enables realtime AI capabilities like seeing, hearing, and speaking, and is fully compatible with platforms like Dify and Coze.

agent ai asr cpp gemini golang gpt-4 gpt-4o llm low-latency multimodal nextjs14 openai python rag real-time realtime tts vision voice-assistant

Last synced: 31 Mar 2025

https://github.com/canopyai/Orpheus-TTS?tab=readme-ov-file

Towards Human-Sounding Speech

llm realtime tts

Last synced: 17 Aug 2025

https://github.com/permitio/opal

Policy and data administration, distribution, and real-time updates on top of Policy Agents (OPA, Cedar, ...)

authorization cedar hacktoberfest microservices opa opal open-policy-agent openfga policy policy-as-code pubsub realtime websocket

Last synced: 05 Sep 2025

https://github.com/livebook-dev/livebook

Automate code & data workflows with interactive Elixir notebooks

charts collaborative distributed-computing elixir liveview markdown math notebooks phoenix realtime visualization

Last synced: 13 May 2025

https://github.com/soketi/soketi

Next-gen, Pusher-compatible, open-source WebSockets server. Simple, fast, and resilient. 📣

broadcasting cloudflare docker hacktoberfest helia ipfs javascript libp2p nodejs p2p pusher real-time realtime websocket websockets ws

Last synced: 08 May 2025

https://github.com/zhec/realtime_multi-person_pose_estimation

Code repo for realtime multi-person pose estimation in CVPR'17 (Oral)

caffe computer-vision cpp11 cvpr-2017 deep-learning human-behavior-understanding human-pose-estimation matlab python realtime

Last synced: 14 May 2025

https://github.com/ZheC/Realtime_Multi-Person_Pose_Estimation

Code repo for realtime multi-person pose estimation in CVPR'17 (Oral)

caffe computer-vision cpp11 cvpr-2017 deep-learning human-behavior-understanding human-pose-estimation matlab python realtime

Last synced: 06 Apr 2025

https://github.com/dbolya/yolact

A simple, fully convolutional model for real-time instance segmentation.

instance-segmentation pytorch real-time realtime yolact

Last synced: 14 May 2025

https://github.com/partykit/partykit

PartyKit simplifies developing multiplayer applications

backends collaboration crdts durable-objects edge-computing games gaming multiplayer real-time realtime websockets yjs

Last synced: 14 May 2025

https://github.com/TEN-framework/TEN-Agent

TEN Agent is a conversational voice AI agent powered by TEN, integrating Deepseek, Gemini, OpenAI, RTC, and hardware like ESP32. It enables realtime AI capabilities like seeing, hearing, and speaking, and is fully compatible with platforms like Dify and Coze.

agent ai asr cpp gemini golang gpt-4 gpt-4o llm low-latency multimodal nextjs14 openai python rag real-time realtime tts vision voice-assistant

Last synced: 08 Mar 2025

https://github.com/dunglas/mercure

🪽 An open, easy, fast, reliable and battery-efficient solution for real-time communications

api async-api golang graphql hacktoberfest hypermedia mercure push realtime realtime-api server-sent-events streaming-api subscriptions web-api websocket

Last synced: 12 May 2025

https://github.com/narrativescience-old/log.io

Real-time log monitoring in your browser

log-monitoring realtime ui

Last synced: 14 May 2025

https://github.com/NarrativeScience-old/log.io

Real-time log monitoring in your browser

log-monitoring realtime ui

Last synced: 21 Mar 2025

https://github.com/microsoft/fluidframework

Library for building distributed, real-time collaborative web applications

collaboration crdt datastructure distributed fluid fluid-framework microsoft realtime

Last synced: 06 Jan 2026

https://github.com/microsoft/FluidFramework

Library for building distributed, real-time collaborative web applications

collaboration crdt datastructure distributed fluid fluid-framework microsoft realtime

Last synced: 17 Mar 2025

https://github.com/lipku/LiveTalking

Real time interactive streaming digital human

aigc digihuman digital-human er-nerf lip-sync metahuman-stream musetalk nerf realtime streaming talking-head virtualhumans wav2lip

Last synced: 01 Mar 2025

https://github.com/n0-computer/iroh

peer-2-peer that just works

does-anyone-read-these memes p2p realtime rust tags tagsoftags

Last synced: 13 May 2025

https://github.com/six-ddc/plow

A high-performance HTTP benchmarking tool that includes a real-time web UI and terminal display

apachebench cli http load load-testing performance realtime visualization wrk

Last synced: 13 May 2025

https://github.com/h2oai/wave

Realtime Web Apps and Dashboards for Python and R

app dashboard hacktoberfest python r realtime typescript visualization webapp

Last synced: 14 May 2025

https://github.com/spacecloud-io/space-cloud

Open source Firebase + Heroku to develop, scale and secure serverless apps on Kubernetes

baas database event-driven firebase graphql kubernetes microservice microservices mongodb mssql mysql paas postgres realtime serverless

Last synced: 15 Dec 2025

https://github.com/MetinSeylan/Vue-Socket.io

😻 Socket.io implementation for Vuejs and Vuex

realtime redux socket-io vue vue-socket vuejs vuex websocket

Last synced: 15 Mar 2025

https://github.com/metinseylan/vue-socket.io

😻 Socket.io implementation for Vuejs and Vuex

realtime redux socket-io vue vue-socket vuejs vuex websocket

Last synced: 13 May 2025

https://github.com/emitter-io/emitter

High performance, distributed and low latency publish-subscribe platform.

emitter go golang high-performance low-latency mqtt mqtt-broker networking pubsub realtime

Last synced: 13 May 2025

https://github.com/vuejs/vuefire

🔥 Firebase bindings for Vue.js

database firebase firestore nuxt pinia realtime vue vuex

Last synced: 14 May 2025

https://github.com/fastly/pushpin

A proxy server for adding push to your API, used at the core of Fastly's Fanout service

api fastly-featured fastly-oss-tier1 http-streaming long-polling proxy push realtime server-sent-events streaming websockets zeromq

Last synced: 29 Dec 2025

https://github.com/tixl3d/tixl

Tooll 3 is an open source software to create realtime motion graphics.

animation design directx directx-11 imgui motion-design realtime realtime-rendering

Last synced: 13 May 2025

https://github.com/tooll3/t3

Tooll 3 is an open source software to create realtime motion graphics.

animation design directx directx-11 imgui motion-design realtime realtime-rendering

Last synced: 28 Apr 2025

https://github.com/fanout/pushpin

A proxy server for adding push to your API, used at the core of Fastly's Fanout service

api fastly-featured fastly-oss-tier1 http-streaming long-polling proxy push realtime server-sent-events streaming websockets zeromq

Last synced: 26 Mar 2025

https://github.com/socketstream/socketstream

A framework for Realtime Web Apps

nodejs realtime

Last synced: 30 Dec 2025

https://github.com/koljab/realtimetts

Converts text to speech in realtime

python realtime speech-synthesis text-to-speech

Last synced: 12 May 2025

https://github.com/KoljaB/RealtimeTTS

Converts text to speech in realtime

python realtime speech-synthesis text-to-speech

Last synced: 07 May 2025

https://github.com/pipelinedb/pipelinedb

High-performance time-series aggregation for PostgreSQL

aggregation analytics pipelinedb postgresql push realtime sql stream-processing time-series

Last synced: 18 Mar 2025

https://github.com/zig-gamedev/zig-gamedev

Dev repo for @zig-gamedev libs and sample applications

cross-platform d3d12 demos directx12 game-development gamedev graphics libraries math opengl physics realtime simd webgpu zig ziglang

Last synced: 14 May 2025

https://github.com/peerdb-io/peerdb

Fast, Simple and a cost effective tool to replicate data from Postgres to Data Warehouses, Queues and Storage

bigquery cdc clickhouse cloud-native distributed-systems etl eventhubs kafka postgres postgresql realtime rust s3 snowflake sql stream-processing

Last synced: 14 May 2025

https://github.com/miroslavpejic85/mirotalksfu

🏆 WebRTC - SFU - Simple, Secure, Scalable Real-Time Video Conferences Up to 8k, compatible with all browsers and platforms.

chat chatgpt collaboration conferencing ffmpeg live-streaming mediapipe mediasoup mirotalk realtime scalable-video-conferences screen-capture self-hosted sfu sip video-conferencing video-recording voip webrtc youtube-live

Last synced: 14 May 2025

https://github.com/walkor/phpsocket.io

A server side alternative implementation of socket.io in PHP based on workerman.

chat-demo php phpsocket realtime socket-io socketio workerman

Last synced: 14 May 2025

https://github.com/johnBuffer/AntSimulator

Simple Ants simulator

2d cpp realtime sfml simulation

Last synced: 20 Mar 2025

https://github.com/PeerDB-io/peerdb

Fast, Simple and a cost effective tool to replicate data from Postgres to Data Warehouses, Queues and Storage

bigquery cdc clickhouse cloud-native distributed-systems etl eventhubs kafka postgres postgresql realtime rust s3 snowflake sql stream-processing

Last synced: 28 Mar 2025

https://github.com/hisxo/gitgraber

gitGraber: monitor GitHub to search and find sensitive data in real time for different online services such as: Google, Amazon, Paypal, Github, Mailgun, Facebook, Twitter, Heroku, Stripe...

bugbounty leaks monitor osint realtime redteam security-automation security-tools

Last synced: 15 May 2025

https://github.com/hisxo/gitGraber

gitGraber: monitor GitHub to search and find sensitive data in real time for different online services such as: Google, Amazon, Paypal, Github, Mailgun, Facebook, Twitter, Heroku, Stripe...

bugbounty leaks monitor osint realtime redteam security-automation security-tools

Last synced: 30 Mar 2025

https://github.com/anycable/anycable

Realtime server for reliable two-way communication to power-up any backend

realtime sse websockets

Last synced: 14 May 2025

https://github.com/fluidsynth/fluidsynth

Software synthesizer based on the SoundFont 2 specifications

cross-platform fluidsynth linux midi midi-files midi-player realtime soundfont-synthesizers soundfont2-synthesizer-library soundfonts synthesizer wavetables

Last synced: 13 May 2025

https://github.com/erichlof/three.js-pathtracing-renderer

Real-time PathTracing with global illumination and progressive rendering, all on top of the Three.js WebGL framework. Click here for Live Demo: https://erichlof.github.io/THREE.js-PathTracing-Renderer/Geometry_Showcase.html

global-illumination path path-tracer pathtracing ray raytracing realtime three-js threejs tracer tracing webgl

Last synced: 11 Apr 2025

https://github.com/erichlof/THREE.js-PathTracing-Renderer

Real-time PathTracing with global illumination and progressive rendering, all on top of the Three.js WebGL framework. Click here for Live Demo: https://erichlof.github.io/THREE.js-PathTracing-Renderer/Geometry_Showcase.html

global-illumination path path-tracer pathtracing ray raytracing realtime three-js threejs tracer tracing webgl

Last synced: 25 Mar 2025

https://github.com/FluidSynth/fluidsynth

Software synthesizer based on the SoundFont 2 specifications

cross-platform fluidsynth linux midi midi-files midi-player realtime soundfont-synthesizers soundfont2-synthesizer-library soundfonts synthesizer wavetables

Last synced: 16 Mar 2025

https://github.com/parabolinc/parabol

Free online agile retrospective meeting tool

agile graphql kanban nodejs react realtime redis rethinkdb retrospective saas stripe

Last synced: 11 Apr 2025

https://github.com/ParabolInc/parabol

Free online agile retrospective meeting tool

agile graphql kanban nodejs react realtime redis rethinkdb retrospective saas stripe

Last synced: 03 Apr 2025

https://github.com/servicetitan/stl.fusion

Build real-time apps (Blazor included) with less than 1% of extra code responsible for real-time updates. Host 10-1000x faster APIs relying on transparent and nearly 100% consistent caching. We call it DREAM, or Distributed REActive Memoization, and it's here to turn real-time on!

blazor blazor-components blazor-server blazor-webassembly caching caching-library caching-memory dotnet-framework dotnetcore high-performance highload real-time realtime realtime-tracking websockets

Last synced: 14 May 2025

https://github.com/servicetitan/Stl.Fusion

Build real-time apps (Blazor included) with less than 1% of extra code responsible for real-time updates. Host 10-1000x faster APIs relying on transparent and nearly 100% consistent caching. We call it DREAM, or Distributed REActive Memoization, and it's here to turn real-time on!

blazor blazor-components blazor-server blazor-webassembly caching caching-library caching-memory dotnet-framework dotnetcore high-performance highload real-time realtime realtime-tracking websockets

Last synced: 14 Mar 2025

https://github.com/pingcap/ossinsight

Analysis, Comparison, Trends, Rankings of Open Source Software, you can also get insight from more than 7 billion with natural language (powered by OpenAI). Follow us on Twitter: https://twitter.com/ossinsight

aisql analytics chat2query demo github htap insight openai oss realtime text2sql

Last synced: 14 May 2025

https://github.com/google-gemini/genai-processors

GenAI Processors is a lightweight Python library that enables efficient, parallel content processing.

agent ai asyncio gemini genai generative-ai language-model multimodal python realtime

Last synced: 02 Aug 2025

https://github.com/yomorun/yomo

🦖 Stateful Serverless Framework for Geo-distributed Edge AI Infra. with function calling support, write once, run on any model.

chatgpt distributed-cloud edge-computing function-calling gemini geodistributedsystems gpt-4o low-latency openai quic realtime serverless stateful-serverless stream-processing webassembly yomo

Last synced: 13 May 2025

https://github.com/experiencor/keras-yolo2

Easy training on custom dataset. Various backends (MobileNet and SqueezeNet) supported. A YOLO demo to detect raccoon run entirely in brower is accessible at https://git.io/vF7vI (not on Windows).

convolutional-networks deep-learning realtime regression yolo2

Last synced: 15 May 2025

https://github.com/jimmy201602/webterminal

ssh rdp vnc telnet sftp bastion/jump web putty xshell terminal jumpserver audit realtime monitor rz/sz 堡垒机云桌面 linux devops sftp websocket file management rz/sz otp 自动化运维审计录像文件管理 sftp上传实时监控录像回放网页版rz/sz上传下载/动态口令 django

audit automation bastion bastion-server devops devops-tools django filemanager intersystems jumpserver maintenance monitor rdp realtime sftp ssh terminal terminal-based terminal-emulators webterminal