ACDK - Artefaktur Component Development Kit - is a platform independent C++-framework similar to Java or C#/.NET for generating distributed and scriptable components and applications.
Framework for softwarecomponent integration, interoperability and adoptability through a XML based vocabulary: SoftwareComponent Integration Mark-up Language (SCIML)
TclXPCOM is a binding between Tcl and XPCOM, Mozilla's cross-platform component model. TclXPCOM allows Tcl developers to use and implement XPCOM components with pure Tcl scripts.