Top HACKTOBERFEST GitHub Repositories & Tools (2026)

📱 Nextcloud Android app

A glossy Matrix collaboration client for the web.

Stremio - Freedom to Stream

CNCF Jaeger, a Distributed Tracing Platform

Concise, consistent, and legible badges in SVG and raster format

The Microsoft community Windows Package Manager manifest repository

Hello world in every computer language. Thanks to everyone who contributes to this, make sure to see contributing.md for contribution instructions!

Open-source desktop and web app for Meta's Muse Code CLI. Runs Muse natively on Windows, macOS and WSL2, with a file viewer, inline diffs, approvals and signed auto-updating installers.

Nix Packages collection & NixOS

TiDB is built for agentic workloads that grow unpredictably, with ACID guarantees and native support for transactions, analytics, and vector search. No data silos. No noisy neighbors. No infrastructure ceiling.

OWASP Coraza WAF is a golang modsecurity compatible web application firewall library

Flagsmith is an open-source feature flag platform with remote config, experimentation, and self-hosted or cloud deployment options.

Open source GPS tracking platform - self-hosted or managed, 200+ device protocols

Chef Infra, a powerful automation platform that transforms infrastructure into code automating how infrastructure is configured, deployed and managed across any environment, at any scale

Apache Iceberg

C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.

A reverse proxy that provides authentication with Google, Azure, OpenID Connect and many more identity providers.

A Rust compiler front-end for IDEs

A tool to enforce Swift style and conventions.

Apache Fluss is a streaming storage built for real-time analytics.