Jam is an open source audio chat like Clubhouse. It does not natively support nostr or lightning. https://jam.systems/
The original Nostr Nests (1.0) forked Jam and never released the code changes in violation of the AGPL. As such it was a closed source project. The current Nostr Nests 2.0 however is open source thanks in large part by efforts of Companion to coordinate that amongst the people who were writing the initial code for it.
Corny Chat came into existence as a whole separate fork of Jam, starting efforts over when attempts to get Nostr Nests to release the code for 1.0 failed. It's source code has always been open source and available consistent with the AGPL.
Other prior efforts include vida dot live, which supported login and payments but was also closed source and now appears defunct.