Open Source Programming Languages

• Class-Based
• Prototype-Based

• Awk@
• ElastiC@
• Emacs Lisp@
• Erlang@
• Free Pascal@
• Haskell@
• Intercal@
• Io@
• Limbo@
• Lua@
• Mercury@
• Object Rexx@
• Perl@

• PHP@
• Pike@
• Pliant@
• Python@
• Refal@
• Ruby@
• S-Lang@
• Sather@
• Squeak@
• Tcl-Tk@
• TUNES@
• XOTcl@

• Computers: Open Source 

• ActiveState Programmer Network  - Get to know this online resource and community site for open source language users. Check for cookbooks, documentation, modules, and products.
• AONware  - Contains various software applications, reference material on various web services, including object-oriented programming.
• Planet Source Code  - Highlights this largest public code database; with particulars on articles and tutorials in 11 languages.
• What is Object-Oriented Software  - Contains facts and detailed information about the software.