These two comes into mind:
http://www.gamesas.com/index.php?/topic/1075687-relz-applers-passive-birthsigns
Wow, those birthsigns are
powerful. Each of those birthsigns warp the game experience more than even Atronach does ... you'd have to adapt your entire playing style around which birthsign you picked. I mean, one of them actually forbids you from using weapons or armor, and another from using healing spells.
... It's actually a pretty interesting mod, but not what I was looking for. I'm looking for a mod that makes birthsigns weaker and more supportive, not incredibly powerful and gamechanging. IMHO, your class and race really should be more important factors in your gameplay style than your birthsign is.
http://www.tesnexus.com/downloads/file.php?id=29485
Yes, that's it. Thank you.