Plug-and-play class-library project of standard data structures
FlatBuffers Compiler and Library in C for C
JSON that's part of C++
Automated testing framework for C'
A modern, C++-native, test framework for unit-tests, TDD and BDD
C++ radix 2 & 3 multi-dimension complex FFT & graphical test program
JSON parser in standard C
Code analyzer for C# and VB.NET projects
DNP3 Source code Library for Windows and simulator
A cross-platform C and C++ unit testing framework for the 21st century
C-evo Distant Horizon; Empire Building Game
Editor for the Yamaha V50 4op FM synthesizer
Hamcrest for Objective-C: Powerful, combinable, extensible matchers
Checked C is an extension to C that lets programmers write C code
NUnit 3 Framework
Makes life working with units of measurement just a little bit better
Apache Maven Surefire
Pentaho Data Integration ( ETL ) a.k.a Kettle
Cross platform code coverage for .NET
Khronos-reference front end for GLSL/ESSL, partial front end for HLSL
A go-style coroutine library in C++11 and more
A modern cmake starter project for C++ with a complete build lifecycle
Beautiful, fast anime-style C++ IDE with zero setup for CP
Incredibly fast JavaScript runtime, bundler, test runner
Android unit testing framework