Torch5 provides a matlab-like environment for state-of-the-art machine learning algorithms. It is easy to use and provides a very efficient implementation, thanks to a easy and fast scripting language (Lua) and a underlying C++ implementation.
Lienzo is a gtk-Canvas and Lua program to work in geometry. Unlike others like Cinderella, Cabri, DrGeo, etc... this one focuses in algorithms, not in static figures. the lua interface allows to work with programable objects.