This is an excellent body weight leg and glute workout from Craig Ballantyne. He is a very highly respected fitness writer and his blog is an excellent source for workouts as is his YouTube channel, cbathletics. You can also find great workouts for any body part just by typing in your chosen exercise. Anything that comes up with Craig's videos or material is highly recommended and very effective.
I actually use something very similar to this in my own workouts sometimes with weights but it can certainly be done as a circuit without weights. Just click on the video below to watch.
If you have a particular exercise that you want to or know more about, leave me a comment and I will post it for you or send you some information directly via email.