Language Learning with Netflix - Use movies as study material for language learning
Pennywise - Cross-platform application to open any website or media in a floating window
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Caption - Open-source captioning tool to help find the right subtitles.
PiPer - A DIY Minecraft computer to build gadgets