I recently did some research on compilers for the Propeller and found cornucopia of tools for every conceivable language. It appears that the world does not need another compiler for the Propeller. Having said that, I couldn't help myself. A few years ago I took a class on compiler design and got hooked.
My compiler, named PropC, is a command line compiler. I accepts a language that is not standard C, but provides access to all of the Propellers features. It compiles to Propeller assembly code. I also added an assembler so the programs can be used by SimpleIDE and Propeller Tool.
I just uploaded the entire project, including source, to a SourceForge project, sourceforge.net/projects/propc2asm/
. The file PropC_UM.pdf will explain all the details.
I wrote this thing for the pure joy of learning something new. Enjoy.