I'm really partial to judo throws, my favorites there are O soto Gari (outside leg reap) and O goshi (hip throw). But my absolute favorite is this one, the Single-leg pickup into Kouchi Gari (inner leg reap), I'll try to get pictures/Video up somewhere, for the folks who need a visual aid.
Setup:1. I start in a body lock, chest to chest with both of my underhooks.
2. From here I step back, letting the underhooks go and in the same motion dropping levels to his waist.
3.I bring my hands together behind the knee of his outside/lead leg(I use a gable grip) and pick it up bringing it tight into my body.
The fun part
:4. I drive my weight forward over the outside of the trapped leg, and rip their weight to the side, breaking their balance.
5. As soon as I've broken their balance, I come of my back leg, bringing it forward and then driving my foot into the back of their knee.
6. To finish I keep driving my weight forward, bringing them to the ground, and come around the outside of the trapped leg into side control.
That's my favorite TD, feel free to use it, and please, share your own!