Lunyr - A decentralized crowdsourced encyclopedia.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Noat Cards - A knowledge learning and sharing platform
RenPy - Ren'Py is a free and cross-platform visual novel engine that helps you use words, pictures, and...
Tealfeed - A knowledge sharing platform to empower creators
Quest - Quest lets you create sophisticated text-based games, without having to program.