StepTalk is a scripting framework for creating scriptable servers or applications. StepTalk, when combined with the dynamism that the Objective-C language provides, goes way beyond mere scripting. It is written using GNUstep.
PoieticFlows โ Stock and Flow domain model for PoieticCore library. Includes the Poietic command-line tool for working with models and running simulations.
Past
Cubes โ lightweight Python OLAP library and server (not maintained)
Expressions โ arithmetic expression parsing and conversion (not maintained)