Top MONO GitHub Repositories & Tools (2026)

Annotate and review coding agent plans and code diffs visually, share with your team, send feedback to agents with one click.

Command-line program to download image galleries and collections from several image hosting sites

Build system optimized for JavaScript and TypeScript, written in Rust

The ultimate RAG for your monorepo. Query, understand, and edit multi-language codebases with the power of AI and knowledge graphs

An innovative superfamily of fonts for code

.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!

Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.

Production Grade Cloud-Ready .NET 10 Starter Kit (Web API + React Client) with Multitenancy Support, and Clean/Modular Architecture that saves roughly 200+ Development Hours! All Batteries Included.

A build system and monorepo management tool for the web ecosystem, written in Rust.

JetBrains Maple Mono: The free and open-source font fused with JetBrains Mono & Maple Mono

Home of .NET's Virtual Monolithic Repository which includes all the code needed to build the .NET SDK.

Re-implementation of The Sims Online.

The most comprehensive universal, multilingual, and monolingual dictionaries—perfect for e-readers, phones, tablets, and desktop apps. Powered by Wiktionary.

Native Telegram client for Android

The ultimate community-driven, and open-source competitive rhythm game available on Steam.

Libraries for handling and rendering Rich Text 📄

Cross-platform 2D game engine focused on ultimate productivity built in .NET

Contao Open Source CMS

Paxeer X is a Distributed HyperState Machine for payments, code execution and intent routing. Designed for Machines and the Users operating them.

Various tools, trinkets and experiments