Corny Chat, like Nostr Nests, is built on Jam Systems. It's a service offered on a website (https://cornychat.com) which allows you to join or create an audio chat room.  Enhancements unique to Corny Chat include Nostr NIP-07 login and zapping support, along with an abundance of individual room customizations for color themes, background images, emojis and more that help give individual rooms their own flare.

The codebase has been forked and now lives at https://github.com/vicariousdrama/cornychat.  The readme of the repository provides a high level roadmap of features that I'd like to include.  There are some outstanding bounties on the nostrbounties.com website.

From a technical standpoint, under the covers its a react app using script to interface with mediasoup for communication using webrtc.  I've been spending a good deal of time in the rooms over the past few weeks developing and testing.