Strange Days - A surreal but fairly serious 20th century ATL, diverging roughly in 1934.
50 Years - Didn't originate the collaborative ATL, but was one of the more obvious co-creators.
100 Years: The World Changes - Did actually start the collaborative ATL, popularized the format more.
200 Years: The World Changes - See above, though it's yet to be finished yet.
The Luciferian Crusade - A dystopic ATL based on the idea of a real life “super terrorist” organization emerging in the Cold War, a la 1980s action and spy franchises.
Sixth World - A dystopic ASB ATL based on the Shadowrun series.
Saturday Morning Cartoon Funhouse hub - A series of different ATLs inspired by various popular action cartoons.
Broken Rooms hub - A series of different ATLs expanding on various scenarios from the obscure Broken Rooms RPG.
Fox Comics - Formed much of the basis for the ATL and shared universe.