I've been impressed by both the idea and the execution of Project We Believe. Participating is easy-- you send in a photo and a quote that inspires you and promotes tolerance. They have also recently started their "Celebrating Women Everyday" video series which features women and the various reasons they like being themselves.
I find their mission statement interesting because they say that they are more than just a movement. Since many organizations aren't even close to becoming a movement I was very intrigued by what else they aspire to be. They write that participants are also taking a "pledge of defiance against the extremists, the dictators, the fear-mongers, the assassins".
I love the simplicity and the scope of Project We Believe and hope you check it out too!