I'm not necessarily recommending any of these, but google the following terms:
Sheiko (or Sheyko as it's sometimes spelt)
Christian Thibaudeau auto-regulating
Bill Starr 5x5
personally I'm sold on westside, although I've tried all of the above with 'some' success. Sheyko is v high volume - good for learning the 3 lifts but be wary of overtraining. 3x3 is a tad high volume/low intensity IMO, and excruciatingly dull. CT's auto-regulating worked well for me, but I was bored by the end.