A powerful macro processor based on python
ADP is a script language designed for Web database prgramming.
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
The Saxon XSLT and XQuery processor, developed by Saxonica
eXist-db is a feature rich Open Source native XML database
Emulator of the ancient 8 bit microprocessor SC/MP 2
Student Programming Language (SPL) a subset of PL/I
A Java implementation of XProc: An XML Pipeline Language
MIPS processor in Java
BCPL was designed by Martin Richards at Cambridge University (1966)
Loglan language and Virtual Loglan Processor repository
An object oriented language for concurrent software development
RCL, a simulator for Texas Instrument calculators from the 70's.