Lower Back Exercises

Deadlift technique - word description   

Mastering the deadlift - words & videos  

Deadlift 1 (taller)   Deadlift 2 (shorter) (also glutes, hams)
Sumo Deadlift (also hits glutes hard)
Weighted back hyperextensions - Tina Todd
Rack Pull 

Note that squats and other types of deadlifts also hit the lower back hard.