Free software for maps
CADAM is the open source text-to-CAD web application
Beginner-friendly CAD software available for both web and desktop.
The CompassCAD you know and love, just better.
very good CAD software
DSpice: Design and Simulation of Circuits using Spice
A canvas library for generating technical drawings
OpenFOAM UI based on web
Software to analyse 3D and 2D framed structures, also gives matrices