K3Studio is the universal workbench for 2d/3d modeling, visualization and simulation.
The main topic is simulation and visualization of automata networks, but it can be used for diagram drawing, flowcharting, presentation, as a CAD, GIS,...
FreeTerm is a virtual console based on Konsole. FreeTerm replaces Konsole's custom "session" MDI interface with Qt's MDI Workspace. FreeTerm also has multi-language support for BBS or MUD.