Shroomy
Adventurer
UA is essentially a set of optional, OGL-derived house rules that either replaces or supplements rules in the core 3.5e game. It doesn't matter if WoTC collected them and placed them in a hard-covered splatbook, that's what they are, and other than a few of the optional class variants (I remember a Paladin of Slaughter or Tyranny in one of the late 3.5e adventures) and the taint/corruption rules (which were modified for future sourcebooks), I don't remember a lot of those rules ever getting any type of official support by WoTC.