A long-running thread in the Alien Space Bats forum, created by B Munro and specialising in shorter-prose ASB allohistorical scenarios, often accompanied with a snazzy, detailed map of that scenario's/timeline's world.
In typical B Munro fashion, many of the scenarios include a lot of humour, whether dark or full of levity. About half the scenarios are original matters, and the other half are inspired by various existing fiction (obscure or well-known), serving as their source material.
The “ASB Settings” project has gained something of a cult following on AH.com over the years, and counts as not only B Munro's magnum opus on the site, but one of the most accomplished collections of short work AH writing and map-making in AH.com history so far.
ASB Settings Scenario Index - Click here to see the full overview of Bruce's collection of scenarios to date.