Kepler.gl is a powerful open source geospatial analysis tool for data
A self-hosted digital asset manager for 3d print files
Translate the video from one language to another and embed dubbing
Electronic design and programming tools suite like Eagle, MpLab
GladTeX -- embed LaTeX-quality images in HTML
RCL, a simulator for Texas Instrument calculators from the 70's.
Runge is an Interactive Solver for Systems of Differential Equations
Semantically enriched WSDL 2.0 descriptors for BioMoby services
PetriNetExec a library for embedding Petri Nets into Java applications
UML 2 Statemachine for C++ is a development framework with DSL support