Audio and Music

• flac - Native Go FLAC encoder/decoder with support for FLAC streams.
• gaad - Native Go AAC bitstream parser.
• GoAudio - Native Go Audio Processing Library.
• gosamplerate - libsamplerate bindings for go.
• malgo - Mini audio library.
• minimp3 - Lightweight MP3 decoder library.
• music-theory - Music theory models in Go.
• PortAudio - Go bindings for the PortAudio audio I/O library.
• id3v2 - ID3 decoding and encoding library for Go.
• Oto - A low-level library to play sound on multiple platforms.

Authentication and OAuth

• authboss - Modular authentication system for the web. It tries to remove as much boilerplate and "hard things" as possible so that each time you start a new web project in Go, you can plug it in, configure, and start building your app without having to build an authentication system each time.
• branca - branca token specification implementation for Golang 1.15+.
• cookiestxt - provides parser of cookies.txt file format.
• go-guardian - Go-Guardian is a golang library that provides a simple, clean, and idiomatic way to create powerful modern API and web authentication that supports LDAP, Basic, Bearer token and Certificate based authentication.
• go-jose - Fairly complete implementation of the JOSE working group's JSON Web Token, JSON Web Signatures, and JSON Web Encryption specs.
• gologin - chainable handlers for login with OAuth1 and OAuth2 authentication providers.
• gorbac - provides a lightweight role-based access control (RBAC) implementation in Golang.
• goth - provides a simple, clean, and idiomatic way to use OAuth and OAuth2. Handles multiple providers out of the box.
• jeff - Simple, flexible, secure and idiomatic web session management with pluggable backends.
• jwt - Lightweight JSON Web Token (JWT) library.
• jwt - Safe, simple and fast JSON Web Tokens for Go.
• jwt-auth - JWT middleware for Golang http servers with many configuration options.
• keto - Open Source (Go) implementation of "Zanzibar: Google's Consistent, Global Authorization System". Ships gRPC, REST APIs, newSQL, and an easy and granular permission language. Supports ACL, RBAC, and other access models.
• oauth2 - Successor of goauth2. Generic OAuth 2.0 package that comes with JWT, Google APIs, Compute Engine and App Engine support.
• osin - Golang OAuth2 server library.
• otpgo - Time-Based One-Time Password (TOTP) and HMAC-Based One-Time Password (HOTP) library for Go.
• paseto - Golang implementation of Platform-Agnostic Security Tokens (PASETO).
• permissions2 - Library for keeping track of users, login states and permissions. Uses secure cookies and bcrypt.
• scs - Session Manager for HTTP servers.
• securecookie - Efficient secure cookie encoding/decoding.
• session - Go session management for web servers (including support for Google App Engine - GAE).
• sessions - Dead simple, highly performant, highly customizable sessions service for go http servers.
• sjwt - Simple jwt generator and parser.
• casbin - Authorization library that supports access control models like ACL, RBAC, ABAC.
• loginsrv - JWT login microservice with plugable backends such as OAuth2 (Github), htpasswd, osiam.
• scope - Easily Manage OAuth2 Scopes In Go.
• sessionup - Simple, yet effective HTTP session management and identification package.
• otpgen - Library to generate TOTP/HOTP codes.

Benchmarks

Other Software

• autobench - Framework to compare the performance between different Go versions.
• go-benchmark-app - Powerful HTTP-benchmark tool mixed with Аb, Wrk, Siege tools. Gathering statistics and various parameters for benchmarks and comparison results.
• go-benchmarks - Few miscellaneous Go microbenchmarks. Compare some language features to alternative approaches.
• go-http-routing-benchmark - Go HTTP request router benchmark and comparison.
• go-json-benchmark - Go JSON benchmark.
• go-ml-benchmarks - benchmarks for machine learning inference in Go.
• go-web-framework-benchmark - Go web framework benchmark.
• go_serialization_benchmarks - Benchmarks of Go serialization methods.
• golang-sql-benchmark - Collection of benchmarks for popular Go database/SQL utilities.
• gospeed - Go micro-benchmarks for calculating the speed of language constructs.
• kvbench - Key/Value database benchmark.
• skynet - Skynet 1M threads microbenchmark.
• speedtest-resize - Compare various Image resize algorithms for the Go language.
• gocostmodel - Benchmarks of common basic operations for the Go language.

Blockchain

• cosmos-sdk - A Framework for Building Public Blockchains in the Cosmos Ecosystem.
• go-ethereum - Official Go implementation of the Ethereum protocol.
• gossamer - A Go implementation of the Polkadot Host.
• solana-go - Go library to interface with Solana JSON RPC and WebSocket interfaces.
• tendermint - High-performance middleware for transforming a state machine written in any programming language into a Byzantine Fault Tolerant replicated state machine using the Tendermint consensus and blockchain protocols.

Bot Building

• echotron - An elegant and concurrent library for Telegram Bots in Go.
• ephemeral-roles - A Discord bot for managing ephemeral roles based upon voice channel member presence.
• go-chat-bot - IRC, Slack & Telegram bot written in Go.
• go-sarah - Framework to build bot for desired chat services including LINE, Slack, Gitter and more.
• go-tgbot - Pure Golang Telegram Bot API wrapper, generated from swagger file, session-based router and middleware.
• go-twitch-irc - Library to write bots for twitch.tv chat
• Golang CryptoTrading Bot - A golang implementation of a console-based trading bot for cryptocurrency exchanges.
• govkbot - Simple Go VK bot library.
• hanu - Framework for writing Slack bots.
• larry - Larry 🐦 is a really simple Twitter bot generator that tweets random repositories from Github built in Go.
• margelet - Framework for building Telegram bots.
• micha - Go Library for Telegram bot api.
• olivia - A chatbot built with an artificial neural network.
• slack-bot - Ready to use Slack Bot for lazy developers: Custom commands, Jenkins, Jira, Bitbucket, Github...
• slacker - Easy to use framework to create Slack bots.
• slackscot - Another framework for building Slack bots.
• tbot - Telegram bot server with API similar to net/http.
• telebot - Telegram bot framework written in Go.
• telego - Telegram Bot API library for Golang with full one-to-one API implementation.
• teleterm - Telegram Bot Exec Terminal Command.
• Tenyks - Service oriented IRC bot using Redis and JSON for messaging.
• wayback - A bot for Telegram, Mastodon, Slack, and other messaging platforms archives webpages.
• Kelp - official trading and market-making bot for the Stellar DEX. Works out-of-the-box, written in Golang, compatible with centralized exchanges and custom trading strategies.
• telegram-bot-api - Simple and clean Telegram bot client.
• go-joe - A general-purpose bot library inspired by Hubot but written in Go.

Build Automation

• 1build - Command line tool to frictionlessly manage project-specific commands.
• anko - Simple application watcher for multiple programming languages.
• gaper - Builds and restarts a Go project when it crashes or some watched file changes.
• goyek - Create build pipelines in Go.
• mage - Mage is a make/rake-like build tool using Go.
• mmake - Modern Make.
• Task - simple "Make" alternative.
• taskctl - Concurrent task runner.
• gilbert - Build system and task runner for Go projects.
• realize - Go build system with file watchers and live reload. Run, build and watch file changes with custom paths.

Code Analysis

Routers

• GoCover.io - GoCover.io offers the code coverage of any golang package as a service.
• goreturns - Adds zero-value return statements to match the func return types.
• gosimple - gosimple is a linter for Go source code that specialises on simplifying code.
• staticcheck - staticcheck is go vet on steroids, applying a ton of static analysis checks you might be used to from tools like ReSharper for C#.
• unused - unused checks Go code for unused constants, variables, functions and types.
• apicompat - Checks recent changes to a Go project for backwards incompatible changes.
• asty - Converts golang AST to JSON and JSON to AST.
• ChainJacking - Find which of your Go lang direct GitHub dependencies is susceptible to ChainJacking attack.
• dupl - Tool for code clone detection.
• errcheck - Errcheck is a program for checking for unchecked errors in Go programs.
• gcvis - Visualise Go program GC trace data in real time.
• go-checkstyle - checkstyle is a style check tool like java checkstyle. This tool inspired by java checkstyle, golint. The style referred to some points in Go Code Review Comments.
• go-cleanarch - go-cleanarch was created to validate Clean Architecture rules, like a The Dependency Rule and interaction between packages in your Go projects.
• go-critic - source code linter that brings checks that are currently not implemented in other linters.
• go-mod-outdated - An easy way to find outdated dependencies of your Go projects.
• go-outdated - Console application that displays outdated packages.
• goast-viewer - Web based Golang AST visualizer.
• golang-ifood-sdk - iFood API SDK.
• golines - Formatter that automatically shortens long lines in Go code.
• GoLint - Golint is a linter for Go source code.
• GoPlantUML - Library and CLI that generates text plantump class diagram containing information about structures and interfaces with the relationship among them.
• gostatus - Command line tool, shows the status of repositories that contain Go packages.
• lint - Run linters as part of go test.
• php-parser - A Parser for PHP written in Go.
• tickgit - CLI and go package for surfacing code comment TODOs (in any language) and applying a git blameto identify the author.
• todocheck - Static code analyser which links TODO comments in code with issues in your issue tracker.
• unconvert - Remove unnecessary type conversions from Go source.
• usestdlibvars - A linter that detect the possibility to use variables/constants from the Go standard library.
• validate - Automatically validates struct fields with tags.
• tarp - tarp finds functions and methods without direct unit tests in Go source code.
• goimports - Tool to fix (add, remove) your Go imports automatically.

Command Line

Advanced Console UIs

• gommon/color - Style terminal text.
• asciigraph - Go package to make lightweight ASCII line graph ╭┈╯ in command line apps with no other dependencies.
• aurora - ANSI terminal colors that supports fmt.Printf/Sprintf.
• box-cli-maker - Make Highly Customized Boxes for your CLI.
• cfmt - Contextual fmt inspired by bootstrap color classes.
• cfmt - Simple and convenient formatted stylized output fully compatible with fmt library.
• chalk - Intuitive package for prettifying terminal/console output.
• colourize - Go library for ANSI colour text in terminals.
• crab-config-files-templating - Dynamic configuration file templating tool for kubernetes manifest or general configuration files.
• ctc - The non-invasive cross-platform terminal color library does not need to modify the Print method.
• go-ataman - Go library for rendering ANSI colored text templates in terminals.
• go-colorable - Colorable writer for windows.
• go-colortext - Go library for color output in terminals.
• go-isatty - isatty for golang.
• go-prompt - Library for building a powerful interactive prompt, inspired by python-prompt-toolkit.
• gocui - Minimalist Go library aimed at creating Console User Interfaces.
• gookit/color - Terminal color rendering tool library, support 16 colors, 256 colors, RGB color rendering output, compatible with Windows.
• marker - Easiest way to match and mark strings for colorful terminal outputs.
• mpb - Multi progress bar for terminal applications.
• progressbar - Basic thread-safe progress bar that works in every OS.
• pterm - A library to beautify console output on every platform with many combinable components.
• simpletable - Simple tables in terminal with Go.
• spinner - Go package to easily provide a terminal spinner with options.
• tabby - A tiny library for super simple Golang tables.
• table - Small library for terminal color based tables .
• tabular - Print ASCII tables from command line utilities without the need to pass large sets of data to the API.
• termbox-go - Termbox is a library for creating cross-platform text-based interfaces.
• termdash - Go terminal dashboard based on termbox-go and inspired by termui.
• termenv - Advanced ANSI style & color support for your terminal applications.
• termui - Go terminal dashboard based on termbox-go and inspired by blessed-contrib.
• uilive - Library for updating terminal output in realtime.
• uiprogress - Flexible library to render progress bars in terminal applications.
• uitable - Library to improve readability in terminal apps using tabular data.
• yacspin - Yet Another CLi Spinner package, for working with terminal spinners.

Standard CLI

• hiboot cli - cli application framework with auto configuration and dependency injection.
• acmd - Simple, useful and opinionated CLI package in Go.
• argparse - Command line argument parser inspired by Python's argparse module.
• argv - Go library to split command line string as arguments array using the bash syntax.
• cli - Feature-rich and easy to use command-line package based on golang struct tags.
• cli - Simple and complete API for building command line interfaces in Go.
• climax - Alternative CLI with "human face", in spirit of Go command.
• clîr - A Simple and Clear CLI library. Dependency free.
• cmd - Extends the standard flag package to support sub commands and more in idiomatic way.
• cmdr - A POSIX/GNU style, getopt-like command-line UI Go library.
• cobra - Commander for modern Go CLI interactions.
• command-chain - A go library for configure and run command chains - such like pipelining in unix shells.
• commandeer - Dev-friendly CLI apps: sets up flags, defaults, and usage based on struct fields and tags.
• complete - Write bash completions in Go + Go command bash completion.
• Dnote - A simple command line notebook with multi-device sync.
• elvish - An expressive programming language and a versatile interactive shell.
• env - Tag-based environment configuration for structs.
• flag - Simple but powerful command line option parsing library for Go supporting subcommand.
• flaggy - A robust and idiomatic flags package with excellent subcommand support.
• flagvar - A collection of flag argument types for Go's standard flag package.
• go-arg - Struct-based argument parsing in Go.
• go-commander - Go library to simplify CLI workflow.
• go-flags - go command line option parser.
• go-getoptions - Go option parser inspired on the flexibility of Perl’s GetOpt::Long.
• gocmd - Go library for building command line applications.
• job - JOB, make your short-term command as a long-term job.
• kingpin - Command line and flag parser supporting sub commands (superseded by kong; see below).
• liner - Go readline-like library for command-line interfaces.
• mcli - A minimal but very powerful cli library for Go.
• mitchellh/cli - Go library for implementing command-line interfaces.
• mow.cli - Go library for building CLI applications with sophisticated flag and argument parsing and validation.
• ops - Unikernel Builder/Orchestrator.
• pflag - Drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags.
• sand - Simple API for creating interpreters and so much more.
• strumt - Library to create prompt chain.
• subcmd - Another approach to parsing and running subcommands. Works alongside the standard flag package.
• ts - Timestamp convert & compare tool.
• ukautz/clif - Small command line interface framework.
• urfave/cli - Simple, fast, and fun package for building command line apps in Go (formerly codegangsta/cli).
• wlog - Simple logging interface that supports cross-platform color and concurrency.
• wmenu - Easy to use menu structure for cli applications that prompts users to make choices.
• sflags - Struct based flags generator for flag, urfave/cli, pflag, cobra, kingpin and other libraries.
• carapace-bin - Multi-shell multi-command argument completer.