Expert System Tool
The Tool Command Language implementation
A powerful macro processor based on python
The GNU Prolog native compiler
Interpreter and compiler for the Seed7 programming language.
Advanced TECO dialect and interactive screen editor based on Scintilla
Next Scripting Framework (NSF)
A free, cross-platform emulator for GW-BASIC, PCjr & Tandy BASIC
A Java VM for ARDUINO and other micros using the leJOS runtime.
Template-based code generation language.
Open Design and Integration Environment