The Grain compiler toolchain and CLI, home of the modern web staple
Complete IDE for Batch files with BAT To EXE Compiler and Debugger.
New home to HbQt, HbIDE & HbDBU once Harbour SVN hosted contribs.
Lightweight IDE for Java
ATasm is a 6502 command-line cross-assembler.
OpenM++: open source microsimulation platform
Oberon V4 for Linux and sources for different Oberon V4 implementation
Decompiler for Scouting13
Open Source PLC based on the arduino platform
zCOBOL portable mainframe COBOL compiler, part of the z390 project