Sming - powerful open source framework simplifying the creation of embedded C++ applications.
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SIMD Vector Classes for C++
- vectorization
- parallel
- simd-vector
- simd-instructions
OpenDDS is an open source C++ implementation of the Object Management Group (OMG) Data Distribution Service (DDS). OpenDDS also supports Java bindings through JNI.
- dds
- c-plus-plus
- java
- opendds
C++ implementation of a fast hash map and hash set using robin hood hashing
- c-plus-plus
- cpp
- hash-map
- data-structures
A fast & densely stored hashmap and hashset
- c-plus-plus
- cpp17
- cpp
- hash
The Polygon Mesh Processing Library
- mesh-processing
- geometry-processing
- polygon-mesh
- triangle-mesh
Open-source compositing software. Node-graph based. Similar in functionalities to Adobe After Effects and Nuke by The Foundry.
- c-plus-plus
- vfx
- cross-platform
- openfx
CppUTest unit testing and mocking framework for C/C++
- cpputest
- unit-testing
- test-driven-development
- c-plus-plus
Slides and other materials from CppCon 2018
- c-plus-plus
- cppcon
- cppcon2018
Primary repository for the Trilinos Project
- snl-science-libs
- sandia-national-laboratories
- hpsf
- scientific-computing
SymEngine is a fast symbolic manipulation library, written in C++
- math
- computer-algebra
- c-plus-plus
Async++ concurrency framework for C++11
Open Babel is a chemical toolbox designed to speak the many languages of chemical data.
- chemistry
- chemical-data
- cheminformatics
- c-plus-plus
UPnP Media Server for 2026: Stream your digital media through your home network and consume it on all kinds of UPnP supporting devices 📱💻📺
- upnp
- mediaserver
- upnp-av
- cmake
Kratos Multiphysics (A.K.A Kratos) is a framework for building parallel multi-disciplinary simulation software. Modularity, extensibility and HPC are the main objectives. Kratos has BSD license and is written in C++ with extensive Python interface.
- kratos
- fem
- dem
- parallel-computing
TreeFrog Framework : High-speed C++ MVC Framework for Web Application
The official C++ client API for PostgreSQL.
- postgresql
- postgres
- cplusplus
- cplusplus-17
A high-performance Internet Relay Chat (IRCv3) server for UNIX-like and Windows systems
- inspircd
- c-plus-plus
- irc-server
- ircv3
universal serialization engine
- c-plus-plus
- serialization
- json
- xml
scanf for modern C++
- c-plus-plus
- cpp
- scanf
- input
TOML for Modern C++
- toml
- c-plus-plus-11
- c-plus-plus
- parser
Cross-platform, efficient, customizable, and robust asynchronous HTTP(S)/WebSocket server C++ library with the right balance between performance and ease of use
- cpp
- cplusplus
- http-server
- websockets
GemRB is a portable open-source implementation of Bioware’s Infinity Engine.
- c-plus-plus
- python
- isometric
- game-engine
Apache OpenOffice
- openoffice
- cplusplus
- content