python
Envisage is a Python-based framework for building extensible
applications, that is, applications whose functionality can be
extended by adding "plug-ins". Envisage provides a standard
mechanism for features to be added to an application, whether by the
original developer or by someone else. In fact, when you build an
application using Envisage, the entire application consists
primarily of plug-ins. In this respect, it is similar to the Eclipse
and Netbeans frameworks for Java applications.
envisage