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Defold Engine - Defold lets you quickly build high performing, cross-platform games together with your team.
Rev.com - Transcriptions, captions, and subtitles that are affordable, fast, and high-quality.
BYOND - BYOND is the premier community for making and playing online multiplayer games.
Lilt - A Twitter text adventure
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.