ProM is an extensible framework that supports a wide variety of process mining techniques in the form of plug-ins. Plug-ins currently support the import of and the conversion between several process modelling languages, including Petri nets (PNML, TPN), EPCs/EPKs (Aris graph format, EPML), and YAWL. Mining, analysis, and log filtering plug-ins are also available.
Nomad PIM is an extensible personal information manager. It allows you to keep track of your personal data and provides modules for notes, schedule, contacts, money, diary, and timetracking. It is implemented as an Eclipse RCP application. Like Eclipse, it provides extension points for extensions by additional plugins.