Jainja is a JVM (Java Virtual Machine) written in Java
The GNU Prolog native compiler
Advanced TECO dialect and interactive screen editor based on Scintilla
BASIC language interpreter (multiplatform)
Perform dynamic tunings for realtime music.
A native Windows port of the GNU Compiler Collection (GCC)
Runtime and development environment of Oz
A cross-platform interpreter for many point-and-click adventure games
Text scraping and data munging language.
A functional programming language
Goal-directed answer-set programming
Cross-platform reimplementation of AMOS BASIC (runtime)