I have tried:
Tribex, Vitrix, Tribuloid, Endotest, T-bomb II, Blue Rhino, Activate (the original), PowerFull (the original), DTHC, 6-oxo, Hyperdrol/MassFX, Testdrive, Stoked and Regenesen.
I've probably tried a few more and just don't remember.
The only ones that worked for me were Tribuloid, 6-oxo, and regenesen. Initially I didn't think Regenesen did anything, but when I stopped taking it I realized I was wrong. I was using it to help me recover and regain some strength after injury and laziness.
T-bomb II made my muscles fuller, but didn't give me any strength gains. My bench increase 20lbs on both 6-oxo and Tribuloid.
I didn't get to finish Stoked due to illness so I won't include that as not working for me.