Yes, Freenode has lots of channels for various technologies. It has some more general channels as well. There are other more specific tech networks like Gimpn

Yes, Freenode has lots of channels for various technologies. It has some more general channels as well. There are other more specific tech networks like Gimpnet which is Gnome-heavy, OFTC which is Debian heavy, and Mozilla which is Firefox-heavy. But Freenode is the big tech one.