There's ony one more day to vote for your favorite project proposals from the UC Berkeley Human Rights Center Mobile Challenge!

Every single one of the projects has an element (or many elements, for that matter) of intrige, thoughtfulness, and/or just-plain-cool packed into them and half the fun of voting is simply getting a lay of the land of just what's going on in the world of mobile tech development for good. 

There are numerous services on the web that will help you start your own online petition – often for free. Unfortunately, many of these services are not as effective as they could be. Here are 5 areas in which they could be improved to better serve nonprofits and social change campaigns.