Dumbell split squats,reverse lunges,step ups are great as suggested...
I have written this routine before but it is so effective I thought I'd write it again.

Stand with your heels only on 5 lbs plates,,legs a little wider than shoulder width apart.

clean a pair dumbells up to your shoulders ..like you are going gto do dumbell shoulder presses.

Now squat for 8-12 reps.

Without rest, drop the weights to your side and squat for 10-12 more reps,
Now step off the plates and squat for 10-12 more reps.

Rest 90 seconds and do it again for 3-4 sets

Enjoy the pain!