Take a look at commissionaccount.com . I have heard they are reputable and signed up with them, but I haven't done work on it yet, so I don't know how good they are.
All CRAP. ALL Bad affiliate programs. The small EU ones are the very best, in conversions and experience. But no US players. Once the US law will fade, All these crappy affiliate programs will vanish. You should look for networks that collects offer. They will treat you better and pay you better.