KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
eRepublik - eRepublik is a Free to play, Browser-based and Massively Multiplayer Online video game created and published by eRepublik Labs.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
eRevollution - Massive online multiplayer strategy browser based game.
QUCS - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.
Diplomata The Game - Diplomata requires both, strategy and social skills, and allows you to team up with, and compete