A simple LLVM frontend to Forthlang - my own simple dialect of Forth
A free COBOL compiler
amforth is an extendible interpreter on microcontrollers
Software build-automation tool written in Common Lisp
RetDec is a retargetable machine-code decompiler based on LLVM
Self-contained tool for compiling and uploading Arduino sketches
Electronic design and programming tools suite like Eagle, MpLab