Update: As of September 27, 2018, ISAAC is no longer available on this domain. The links to to it have been removed from the post below, though the remainder of the content has been left unchanged.
ISAAC’s code is still available on GitHub.
Features here are still undergoing development, though, and are subject to change before a Release. We’ll try to avoid pushing things that are completely broken to this mirror, but there may be minor issues here and there.