Emscripten - Emscripten is an LLVM to JavaScript compiler.
Basilisk II - Basilisk II is an Open Source 68k Macintosh emulator.
Tiny C Compiler - The Tiny C Compiler is an x86, x86-64 and ARM processor C compiler created by Fabrice Bellard.
Sheepshaver - Home page of the SheepShaver Macintosh emulator
clang - C, C++, Objective C and Objective C++ front-end for the LLVM compiler.
PCE - PCE is a collection of microcomputer emulators. At the moment it contains three emulators: