A kind of modified butterfly sweep to escape the mont (could be used in half guard too I guess).

Rear Inside-Leg Attack (and Takedown). Note: this is not a sweeping kick. The impact on your opponent's rear leg should be solid, causing his knee to either buckle or break.

Steve Martin's Granby School of Wrestling demonstrates the Perry Sweep Back Door

Steve Martin's Granby School of Wrestling demonstrates the Sweep Single

Steve Martin's Granby School of Wrestling demonstrates the Sweep Cut Back

Steve Martin's Granby School of Wrestling demonstrates the Sweep Low Lift.

Armdrag to establishing a gift wrap from the guard. This leads naturally to a flower sweep, then finishing with a cobra choke. Throughout the entire technique, you have to keep your elbow on the gift-wrap arm tight to his body, pulling it tighter and tighter. Notice that I use my hand like a...

Jiu-Jitsu black belt Rodrigo Gracie teaches a sweep from butterfly guard at Capital Jiu-Jitsu in Alexandria, Virginia

Butterfly guard pop-up to X-Guard, spring-sweep to side control, to cross-side spinning armlock

From Scissor Sweep