RetroArch - RetroArch is a frontend for emulators, game engines and media players.
Mobbin - Latest mobile design patterns & elements library
Batocera.linux - Batocera.linux is an open-source and completely free retro-gaming distribution that can be copied to a USB stick or an SD card with the aim of turning any computer/nano computer into a gaming console during a game or permanently.
pttrns - iPhone and iPad user interface patterns
Playnite - Source code generated using layoutit.com
Page Flows - User flow design inspiration for mobile & desktop