Quads

Barbell Squats
Dumbbell Squats
Smith Machine Squats
Front Squats
Leg Press
Hack Squats
Barbell Lunges
Dumbbell Lunges
Leg Extensions

Hamstrings

Stiff-Legged Deadlifts
Dumbbell Stiff-Legged Deadlifts
Lying Leg Curls
Seated Leg Curls
Standing Leg Curls
Good Mornings