Swear jars are designed to help you put the brakes on your potty mouth - every time you say a bad word, you put a quarter in, and I guess you throw yourself a profanity-free party with the results. The Twitter equivalent is Digital SwearJar, which scours your Twitter feed for cussing; users pledge to send a set amount per outburst to a charity that helps people affected by the famine in East Africa. So if you're an actor in a David Mamet film, you're golden
I've seen several clever twists on charitable giving lately; Fast Company wrote about charity:water, where users ask their Facebook friends to donate a little something toward clean water projects in developing countries. It uses a "pay it forward" psychology that encourages participants to essentially start a new round of giving - after all, no one likes to be the last link in the chain.