Tcl-Tk XOTcl

• Computers: Programming: Languages: Multiparadigm 
• Computers: Programming: Languages: Open Source 

• Dynamic Object Aggregations  - Article about the usage of dynamic object aggregations as a foundation for composition.
• Filters  - Article by Gustaf Neumann and Uwe Zdun about filters as a language support for design patterns in object-oriented scripting languages.
• XOTcl: Extended Object Tcl  - Official home page shares information, history, source and binary downloads, and publications.
• XOTclIDE  - XOTcl Integrated development environment, inspired by Smalltalk programming environments: syntax highlight and checking, version control, test framework.