[dave84]

There's a fairly substantial Demoscene live coding community with shader coding and non-competitive jams (with an archive here: https://livecode.demozoo.org/)

You can take a look at the final of the Shader Showdown at Revision last year here: https://www.youtube.com/watch?v=EJ7KAD0NyGw

There's a TIC-80 'bytejam' every Monday Night (8 or 9pm UK time depending on the week) on https://www.twitch.tv/fieldfxdemo

And you can catch some previous VODs here: https://scenesat.com/videoarchive