#freenode was generally the main IRC node I used with all the good dev rooms.
Seems to still be chugging along. You can even join directly via their web-client: https://freenode.net.
Personally I still use pidgin.im to connect to all the relevant #freenode goodness. Seems people forget it still works and is pretty great even all these years later :).
I forgot Freenode was still running, most projects left for https://libera.chat/
Due to https://en.wikipedia.org/wiki/Freenode#Ownership_change_and_...
Thanks so much for the update. Had no idea. Seems all the main channels moved over. Thanks!
Most went to libera, some went to OFTC[1], and a few moved to matrix as well.
[1] https://www.oftc.net/