BMOCK
C++ mock object library for C functions and member functions
Cactus
In-container unit testing framework for server-side Java (retired)
CallbackParams
JUnit add-on for parameterized testing
Cantata
Unit and integration testing tool for C and C++ on host and embedded targets
CMock
Mock and stub generator for unit testing C code
Ceedling
Build and unit test system for C projects based on Unity and CMock