Algorithms

Bigints

• bigints - Bigints for Nim.
• stint - Stack-based arbitrary-precision integers. Fast and portable with natural syntax for resource-restricted devices.
• theo - An optimized bigint and number theory library for Nim.

Blockchain

• eth - Common utilities for Ethereum.
• nimbus-eth1 - An Ethereum 1.0 and 2.0 client for resource-restricted devices.
• nimbus-eth2 - Efficient implementation of the Ethereum 2.0 blockchain.
• evmc - Ethereum VM binary compatible interface.
• ethash - A pure-Nim implementation of Ethash, the Ethereum proof of work.
• contract-abi - Implements encoding of parameters according to the Ethereum Contract ABI specification.
• web3 - The humble beginnings of a Nim library similar to web3.[js|py]. -->
• abc - Experimental asynchronous blockchain. -->
• nitro - Highly experimental implementation of the Nitro statechannels protocol in Nim. -->
• contract-abi - Implements encoding of parameters according to the Ethereum Contract ABI specification.
• nitro - Highly experimental implementation of the Nitro statechannels protocol in Nim. -->

Compression

• zippy - Pure Nim implementation of deflate, zlib, gzip and zip.
• supersnappy - Dependency-free and performant Nim Snappy implementation.
• snappy - Nim implementation of Snappy compression algorithm.
• zip - Wrapper for the zip library.

Cryptography

• nimcrypto - Nim cryptographic library.
• nimaes - Advanced Encryption Standard, Rinjdael Algorithm written in Nim.
• constantine - Constant time pairing-based of elliptic curve based cryptography and digital signatures.
• bslcurve - Nim implementation of BLS signature scheme (Boneh-Lynn-Shacham) over Barreto-Lynn-Scott (BLS) curve BLS12-381.
• bncurve - Nim implementation of Barreto-Naehrig pairing-friendly elliptic curve.
• xxtea - XXTEA encryption algorithm library.
• crc32 - CRC32 for Nim. Just pass the thing you want to do CRC.
• rollinghash - High performance Nim implementation of a Cyclic Polynomial Hash, aka BuzHash, and the Rabin-Karp algorithm.
• murmurhash - Pure Nim implementation of MurmerHash
• des - DES/3DES, DUKPT and MAC in Nim.
• shimsham - A collection of hash functions, including JH, SHA-2, SHA-3, SipHash, Tiger, and Whirlpool.
• NiMPC - A secure multi-party computation (MPC) library for the Nim programming language.
• hashlib - Hash library that contains almost all the hash functions for Nim.
• xxhash.nim - A wrapper for the xxhash hashing library in Nim.
• bcryptrocks - Nim wrapper of Solar Designer's crypt_blowfish library

Deep Learning

• Arraymancer - A fast, ergonomic and portable tensor library in Nim with a deep learning focus for CPU, GPU, OpenCL and embedded devices.
• NimTorch - PyTorch - Python + Nim. A Nim front-end to PyTorch's native backend, combining Nim's speed, productivity and portability with PyTorch's latest implementations.
• laser - Carefully-tuned primitives for running tensor and image-processing code on CPU, GPUs and accelerators.
• flambeau - Nim bindings to libtorch. -->

Math

• symbolicnim - A symbolic library written purely in Nim.
• impulse - Impulse will be a collection of primitives for signal processing (FFT, Convolutions).
• vectorize - SIMD vectorization backend.
• vmath - Math vector library for graphical things.
• neo - A matrix library.
• manu - Nim MAtrix NUmeric package - a port of JAMA, adapted to Nim.
• nlopt - A wrapper for the nonlinear optimization library Nlopt.

Data

Database

• nimongo - Pure Nim lang MongoDB driver.
• asyncpg - Asynchronous PostgreSQL driver for Nim.
• anonimongo - Another Nim pure Mongo DB driver.
• redis - Official redis wrapper for Nim.
• amysql - Async MySQL Connector write in pure Nim.
• mycouch - Multisync CouchDB driver for Nim.
• SQLiteral - A high level SQLite API for Nim.
• asyncmysql - Asynchronous MySQL connector written in pure Nim.
• sqlcipher - SQLCipher wrapper.
• litestore - A lightweight, self-contained, RESTful, searchable, multi-format NoSQL document store.
• rocksdb - Nim wrapper for RocksDB, a persistent key-value store for flash and RAM Storage.
• ormin - Prepared SQL statement generator , A lightweight ORM.
• allographer - A query_builder/ORM library inspired by Laravel/PHP and Orator/Python for Nim.
• gatabase - Connection-Pooling Compile-Time ORM for Nim.
• norm - Norm is an object-oriented, framework-agnostic ORM for Nim that supports SQLite and PostgreSQL.
• tiny_sqlite - Very lightweight and safe SQLite library.
• limdb - Very high performance, persistent and safe key-value store based on LMDB with Nim table-like interface.
• kuzu - Wrapper for Kuzu - an embedded graph database built for query speed and scalability.
• db_connector - Unified db connector in Nim.
• surrealdb.nim - SurrealDB driver for Nim.
• RocheDB - Ring-oriented NoSQL document and vector store for locality-aware retrieval. [Apache-2.0]
• KoutenDB - Locality-aware NoSQL document/vector database built around rings and orbit-inspired retrieval.

Data Processing

• NimData - DataFrame API written in Nim, enabling fast out-of-core data processing.
• Datamancer - A dataframe library with a dplyr like API.
• nimdataframe - Dataframe for Nim.
• nimhdf5 - Wrapper and some simple high-level bindings for the HDF5 library for Nim.
• mpfit - A wrapper for the cMPFIT library for Nim.

Data Structures

• BitVector - A high-performance Nim implementation of BitVectors.
• rbtree - A Red/Black tree implementation in Nim.
• quadtree - A Quadtree library for Nim.
• kdtree - A pure Nim k-d tree implementation for efficient spatial querying of point data.
• RTree - Generic R-tree implementation for Nim.
• sorta - SortedTables in Nim, based on B-trees.
• minmaxheap - A Nim implementation of a Minimum-Maximum heap.
• BipBuffer - A Nim implementation of Simon Cooke's Bib Buffer
• bloom - Bloom filter implementation in Nim.
• binaryheap - Simple binary heap implementation in Nim.
• faststack - Dynamically resizable data structure for fast iteration over large arrays of similar elements.
• StashTable - Concurrent hash tables for Nim.

Parsing

• parsetoml - A Nim library to parse TOML files.
• NimYAML - YAML implementation for Nim.
• Binarylang - Extensible Nim DSL for creating binary parsers/encoders in a symmetric fashion.
• iniplus - INI parser with support for arrays and tables.
• beautifulparser - Simple library for parsing HTML documents inspired by beautifulsoup4.
• Marvdown - A stupid simple Markdown parser.
• iniplus - Extended INI parser with support for arrays and tables.

Serialization

• nesm - NESM is a tool that generates serialization and deserialization code for a given object.
• serialization - A modern and extensible serialization framework for Nim.
• json-serialization - Flexible JSON serialization not relying on run-time type information.
• protobuf-serialization - The nim-protobuf-serialization.
• ssz-serialization - Nim implementation of Simple Serialize (SSZ) serialization and merkleization.
• toml-serialization - Flexible TOML serialization not relying on run-time type information.
• frosty - Marshal native Nim objects via streams, sockets.
• protobuf-nim - Protobuf implementation in pure Nim that leverages the power of the macro system to not depend on any external tools.
• flatty - Tools and serializer for plain flat binary files.
• bingo - Binary serialization framework for Nim.
• tnetstring - Parsing and serializing for the TNetstring format.

Standards

• isocodes - ISO codes for Nim (ISO 3166-1, ISO 3166-2, ISO 3166-3, ISO 15924, ISO 15924, ISO 639-2, ISO 639-5)

Development Tools

Benchmarking

• golden - A benchmark for compile-time and/or runtime Nim.
• criterion - Statistic-driven micro-benchmark framework.
• stopwatch - A fork of rbmz's stopwatch that adds extra features.
• nimbench - A micro benchmark module for Nim.
• benchy - Simple benchmarking to time your code.
• timeit - Measuring execution times written by Nim.

Binding Generators

• c2nim - c2nim is a tool to translate Ansi C code to Nim.
• nimgen - nimgen is a helper for c2nim to simplify and automate the wrapping of C libraries. Superseded by nimterop.
• nimterop - A Nim package that leverages tree-sitter to make C/C++ interop seamless. Superseded by Futhark.
• Futhark - Automatic wrapping of C headers in Nim with libclang.
• nimpy - Generate Python wrappers and call Python from Nim.
• jnim - Nim - Java bridge.
• rnim - A bridge between R and Nim. Currently this is a barely working prototype. -->

Build Systems / Package Management

• ChooseNim - Installing and switching between Nim versions (à la rustup, pyenv).
• Nake - Describe your Nim builds as tasks.
• Nawabs - A build system that throws away version numbering in favor of git hashes.
• Nimble - Nimble can be used as a build system.
• nimph - Nim package hierarchy manager from the future.
• nimby - A very simple and unofficial package manager for Nim.
• nifty - A decentralized pseudo package manager and script runner.
• nsis - Nim programming language setup tool.
• nim-windows-container - A Windows Container with a complete Nim build environment.
• ChooseNim - Installing and switching between Nim versions (à la rustup, pyenv).
• GrabNim - Install and switch between multiple Nim compiler versions. (Alternative to ChooseNim).
• Atlas - The Atlas Package cloner. It manages an isolated workspace that contains projects and dependencies.
• nim-agent-template - Scaffolding generator and template featuring AI agent skills, MCP tooling, and multi-toolchain build profiles.

Command-Line Interface Automation

• cligen - Infer & generate command-line interace/option/argument parsers.
• docopt.nim - Command-line args parser.
• argparse - Argument parsing for Nim.
• cliche - AutoMagic CLI argument parsing is so cliché.
• loki - A small library for writing line-oriented command interpreters in Nim.
• confutils - Simplified handling of command line options and config files
• Cmdos - A simple way to process cli arguments and help messages.
• cozycliparser - Lean, feature-rich, DSL-free CLI parser based on std/parseopt. Docs.
• Cliquet - A CLI args and config file parser merging both into a single object, with automatic help generation.
• easyargs - Dead simple data-oriented argument parsing for Nim.

Editor Integration

• Editor Support - Official list of editor plugins for Nim.
• nimlsp - The Language Server Protocol implementation for Nim.
• nim.nvim - Nim plugin for NeoVim.
• vscode-nim - Language support for the Nim programming language for VS Code.

Fuzzing

• drchaos - A powerful and easy-to-use fuzzing framework in Nim for C/C++/Obj-C targets.
• libfuzzer - LibFuzzer's interface bindings.

Logging

• chronicles - A crafty implementation of structured logging for Nim.
• morelogging - Logging library for Nim.
• threadlogging - A thread safe logging library using Nim's own logging module.
• watchtower - Lightweight logging library with colorized output, log rotation, and context fields.
• kslog - Minimalistic Kernel-Syslogd For Linux in Nim.

REPL

• jupyternim - A Jupyter kernel for Nim.
• Reploid - A Nim REPL running on top of a nim c or a nimscript VM, import [anything].

Static Analysis

• DrNim - Combines the Nim frontend with the Z3 proof engine, in order to allow verify/validate software.
• nimalyzer - Static code analyzer for Nim, inspired by AdaControl.

Testing

• faker - A Nim package that generates fake data for you.
• balls - A unittest macro to save the world, or at least your Sunday.
• einheit - A Nim unit testing library inspired by Python's unit tests.
• asynctest - Complements the standard unittest module in Nim to allow testing of asynchronous code.
• unittest2 - Fork of the "unittest" Nim module focusing on parallel test execution, test-level scoping and strict exception handling.
• asynctest - Complements the standard unittest module in Nim to allow testing of asynchronous code.

Game Development

Game Engines

• NimForUE - Nim plugin for UE5 with native performance, hot reloading and full interop that sits between C++ and Blueprints.
• nimgame2 - A simple 2D game engine for Nim.
• norx - A complete wrapper of the ORX 2.5D cross platform game engine library.
• godot-nim - Nim bindings for Godot Engine.
• rod - Cross-platform 2D and 3D game engine.
• frag - Cross-platform 2D/3D game engine.
• semicongine - Cross-platform, (almost) dependency-free game engine.
• saohime - An extensible 2D game engine for Nim, inspired by Bevy Engine.
• alasgar - Pure nim 3D game engine based on OpenGL.

Game Frameworks

• nico - Nim Game Framework based on Pico-8.
• natu - Toolkit for writing Game Boy Advance games in Nim.
• naylib - safe Raylib wrapper.
• c4 - Modular and extensible 2D and 3D game framework for Nim.
• paranim - A game library based around carefully chosen abstractions.

Game Libraries

• nimgl - NimGL is a Nim library that offers bindings for popular libraries used in computer graphics.
• glm - Port of the popular glm C++ library to Nim.
• GLAD - Multi-Language Vulkan/GL/GLES/EGL/GLX/WGL Loader-Generator based on the official specs.
• jolt-nim - Native Nim bindings for Jolt Physics 5.6.0 with raw and ownership-safe high-level APIs [MIT].

Rules Engines

• turn_based_game - A game rules engine for simulating or playing turn-based games.
• pararules - A RETE-based rules engine made for games.

Hardware

Backups

• nimvisa - Wrapper for NI-VISA instrument control library.
• ftd2xx - Wrapper for FTDI ftd2xx library (USB to JTAG/SPI/I2C/Bitbang etc.).

Embedded

• ratel - Next-generation, zero-cost abstraction microconroller programming in Nim.
• ardunimo - Nim wrapper for Arduino + LinkIt ONE SDK by Mediatek.
• ardunimesp - Nim wrapper for Arduino ESP8266 framework + A tool for flashing, compiling and making a Nim project into an Arduino project.
• msp430f5510 - Run Nim on MSP430f5510 micro-controller (6KB of RAM).
• Nesper - Program the ESP32 using Nim. Library on top of esp-idf.
• stm32f3 - Run Nim on STM32F3 micro-controller (16KB of RAM).
• boneIO - GPIO implementation for the BeagleBone Black for Nim.
• avr_io - Nim register bindings and utilities for AVR microcontrollers.
• avrman - A tool for managing Nim and C projects targetting AVR microcontrollers.

Language Features

Async IO

• std/async - Async/await implementation in Nim's stdlib (aka asyncdispatch).
• chronos - An efficient library for asynchronous programming.
• cps - Continuation-Passing Style for Nim.

Contracts

• contracts - Used to make contracts - elegant promises that pieces of code will fulfill certain conditions.
• contra - Lightweight and fast self-documenting design by contract programming.

Editors

• Nim Playground - Code and run Nim online.
• moe - A vim-like editor made with Nim, also supports C, Rust, Javascript, etc.
• DoongJohn's Nim playground - An alternative implementation of the Nim playground.
• Nev - A keyboard focused GUI and terminal text editor.

Error Handling

• result - Friendly, exception-free value-or-error returns, similar to Option[T].