I'm sure some of them were already mentioned, but here go my favourites:
Small / new sponsors:
QTbucks (mine)
Prissy Pays (Kate Grounds brand new Program)
Cheesefrog Flow
Lemonade Cash
OT Cash
Akutenshicash
Naughty Girls Cash
I Heart Bucks
Not to forget the well established sponsors:
Phil-Flash-Cash
Spunky Cash
Solar Cash
Pancho Dog
Mayors Money