SubEthaEdit is a collaborative real-time editor designed for Mac OS X.

[5] In June 2014, SubEthaEdit 4 was released, distributed exclusively in the Mac App Store.

With version 5 released in 2019, the application became free and open source, under the MIT license.

[6] Apart from the usual text-editing capabilities, collaborative editing is one of SubEthaEdit's key features.

Using Bonjour (formerly Rendezvous) and BEEP, SubEthaEdit works without any configuration on the LAN but can also coordinate collaborative editing over the Internet.