wtf do these C repos do?

Popular C repositories on GitHub, each decoded: what it actually does, its stack, and how to run it.

mame/lazykLazy K is an interpreter, written in C, that runs programs written in the Lazy K esoteric programming language
mikachu/mpvA free, open-source command-line media player that plays almost any audio or video file using your GPU for hig
mikachu/scrcpyscrcpy mirrors your Android phone screen to your computer and lets you control it with your keyboard and mouse
psibi/hs-ed25519A Haskell library for Ed25519 digital signatures — lets your Haskell app sign and verify messages to prove aut
redis/redis--bot--forkRedis is a super-fast in-memory data store that acts like a quick scratchpad for your app. It handles caching,
zzak/mruby-memcachedA plugin that lets mruby applications store and retrieve data in Memcached, a fast in-memory cache, using simp