World Foundry is a 3D level game engine and asset production pathway with over 170,000 lines of code. Originally a commercial product, now released under the GPL. Designed from the beginning to be cross-platform, runs on windows, working on linux port.
SPT is a 3D application wich allows user to driving Polish trains. Project based on Marcin Wozniak's & McZapkie code. SPT contains powerful world editor.