See also:

• Computers: Programming: Languages: Multiparadigm  (22)
• Computers: Programming: Languages: Object+Oriented  (43)
• Computers: Programming: Languages: Open Source  (2)
• Computers: Programming: Languages: Reflective  (8)
• Computers: Software: Operating Systems: Object+Oriented: Open Source  (19)
• Computers: Software: Operating Systems: Open Source  (15)
• Computers: Software: Operating Systems: Persistent  (3)
• Computers: Software: Operating Systems: Submicrokernel  (12)

• TUNES Project   + Open source resource for learning about programming languages and operating systems. Led by French OS philosopher Fare'. Some 2,000 links.

• LispOS Project - Goal: reflective OS based on LISP. Mostly merged with TUNES. No code, but many ideas politely presented in a fascinating archived mail list. Mail list archives.
• UniOS: A Concept OS - Merging with TUNES. Some useful ideas with very clear, well written explanations, and links. No code.