XVCL is a general-purpose language for configuring variants in all sorts of textual documents (including programs). It is based on frame technology. XVCL processor automates the customization process to produce system from specification of variants.
FramerD is a distributed semi-structured object database originally developed at MIT. It provides an internationalized Scheme-based scripting language, built-in text analysis tools, and special support for web scripting.
Introspect on running programme, view and alter object fields and methods. Edit the code of any method at runtime; apply the changes to any combination of objects, such as an array, or a complete class. Complete rewrite underway available Jan 2007.