CuTest lets you write unit tests for your C code. You should use it because: (1) It has the cutest name, (2) It looks and feels like JUnit, (3) It is cross-platform, (4) It ships in a single .c and .h file for ease of deployment.
TiniUnit is a XUnit-like unit testing framework suitable for use on the Dallas Semiconductors TINI board. TiniUnit is similar the JUnit in intent, but is does not require reflection since the 1.0x version of the TINI OS does not support reflection.