Download MinGW - Minimalist GNU for Windows for free. A native Windows port of the GNU Compiler Collection (GCC) MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality.

LuaJIT is a Just-In-Time (JIT) compiler for the Lua language.

Advanced open source Pascal compiler for Pascal and Object Pascal - Home Page

Haxe is an open source toolkit based on a modern, high level, strictly typed programming language.