Programming in C - rosco-pc/propeller-wiki GitHub Wiki
ANSI C/C++ GCC Compiler and tools funded by Parallax.
Actively developed and supported.
Parallax Propeller-C : PropellerGCC Googlecode, PropellerGCC Googlesite, SimpleIDE
ANSI C89 LCC compiler tools.
Actively developed and supported.
ImageCraft released a version of ICCv7 around 2009. Defunct.
—▷ https://sourceforge.net/projects/propc2asm
Spin2CPP's spinoff FastSpin compiles Spin, BASIC and C to LMM-PASM. The Spin compiler is stable, suport for BASIC is not far from finished (2018-10-31) and compiling C is work in progress (2018-10-31). —▷ https://github.com/totalspectrum/spin2cpp/releases