Zeek is a powerful network analysis framework that is much different from the typical IDS you may know.

Python bindings for the Chromium Embedded Framework (CEF)

Cryptography Toolkit

Distributed C++ services from embedded to enterprise

An RSS/Atom feed reader for text terminals

OpenMLDB is an open-source machine learning database that provides a feature platform computing consistent features for training and inference.

Diablo build for modern operating systems

GNU Radio – the Free and Open Software Radio Ecosystem

Eclipse OMR™ Cross platform components for building reliable, high performance language runtimes

Godot Engine – Multi-platform 2D and 3D game engine

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

RGB Driver for Linux

The reference P4 software switch

ArduPlane, ArduCopter, ArduRover, ArduSub source

Point Cloud Library (PCL)

Open Source Routing Engine for OpenStreetMap

mlpack: a fast, header-only C++ machine learning library

Solidity, the Smart Contract Programming Language

Scalable, Portable and Distributed Gradient Boosting (GBDT, GBRT or GBM) Library, for Python, R, Java, Scala, C++ and more. Runs on single machine, Hadoop, Spark, Dask, Flink and DataFlow

A distributed, fast open-source graph database featuring horizontal scalability and high availability

A modern open source rendering engine for animation and visual effects

Apache Traffic Server™ is a fast, scalable and extensible HTTP/1.1 and HTTP/2 compliant caching proxy server.

An open source, turn-based strategy game with a high fantasy theme.

Avogadro libraries provide 3D rendering, visualization, analysis and data processing useful in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas.

OpenVDB - Sparse volume data structure and tools

The core of our monitoring platform with a powerful configuration language and REST API.

Mumble is an open-source, low-latency, high quality voice chat software.

An audio server, programming language, and IDE for sound synthesis and algorithmic composition.

Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows, macOS and Haiku. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

Mobile Shell

Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU

Guidelines Support Library

Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger protocol in C++

Multipass orchestrates virtual Ubuntu instances

RetroShare is a Free and Open Source cross-platform, Friend-2-Friend and secure decentralised communication platform.

An open source re-implementation of RollerCoaster Tycoon 2 🎢

A fast, scalable, high performance Gradient Boosting on Decision Trees library, used for ranking, classification, regression and other machine learning tasks for Python, R, Java, C++. Supports computation on CPU and GPU.

The new Windows Terminal and the original Windows console host, all in the same place!

Light-weight system monitor for X, Wayland, and other things, too

Share a single keyboard and mouse between multiple computers.

Cross-platform music production software

A framework for building native applications using React

High-level tracing language for Linux

Rolisteam is a virtual tabletop. It helps you to manage tabletop role playing games with remote friends/players. It provides many features to share maps, pictures, dice roller, manage background music and much more. The main git repository is available here: [https://invent.kde.org/kde/rolisteam].

Stan development repository. The master branch contains the current release. The develop branch contains the latest stable development. See the Developer Process Wiki for details.

OpenTTD is an open source simulation game based upon Transport Tycoon Deluxe