An alternate history site which was, throughout much of 2004-2006, AH.com's major rival. The rivalry between the two sites was usually fairly friendly, unlike the majority of AH.com's relations (but then those are more usually with pisspoor knock-off sites such as Alternia).
OTL.com had a very distinct identity to AH.com, in which timelines tended to be more communal affairs and there was less off-topic discussion. Some OTL.commers started to come across and visit AH.com starting in 2005, and many became permanent AH.commers - some exclusively so, when OTL.com began to decline.
AH.com's major objection to the influx of OTL.commers was that they used 'OTL' to mean (an) 'Other Timeline', i.e. an ATL in AH.comese, which was confusing when 'OTL' to AH.commers means Our Timeline, the opposite.
In October 2005, Othertimelines.com had a major crash…
Prominent AH.commers who came across from OTL.com include:
Link (yes, it still lives, although their forum is down)
luakel wrote an AH.com The Series episode featuring the OTL.commers as a rival crew, and there was even a brief movement on OTL.com towards an OTL.com Movie and Series in imitation of the AH.com ones.