The Manifold Atlas Project is (or was) a wiki on differential topology and algebraic topology:
and a fully refereed online, open access journal
housing refereed pages from the wiki. Pages from the wiki are subsequently independent of a published version, so can continue to develop.
NB: The site is down and has been for some time. The last successful snapshot made by the WaybackMachine is, for the landing page, from 2024, Dec 26 and, for the “bulletin” page, from 2025, Feb 28. The latest update to the latter dates back to 2017.
Last revised on July 2, 2025 at 17:00:16. See the history of this page for a list of all contributions to it.