Gobby is a free collaborative editor based on libobby, a library which provides synced document buffers. It supports multiple documents in one session and a multi-user chat. It runs on Microsoft Windows, Mac OS X, Linux and other Unix-like platforms.
M. Liffiton, B. Sheese, J. Savelka, and P. Denny. Proceedings of the 23rd Koli Calling International Conference on Computing Education Research, page 1–11. New York, NY, USA, Association for Computing Machinery, (Feb 6, 2024)
B. Jury, A. Lorusso, J. Leinonen, P. Denny, and A. Luxton-Reilly. Proceedings of the 26th Australasian Computing Education Conference, page 77–86. New York, NY, USA, Association for Computing Machinery, (Jan 29, 2024)
J. Savelka, A. Agarwal, M. An, C. Bogart, and M. Sakr. Proceedings of the 2023 ACM Conference on International Computing Education Research - Volume 1, volume 1 of ICER '23, page 78–92. New York, NY, USA, Association for Computing Machinery, (Sep 10, 2023)