Giftcard Zen - Buy a gift card at a discount
Social Fixer - Social Fixer for Facebook plugs into your browser and improves the existing Facebook.com web site.
Google Payment API - Enable an easy-to-use checkout experience for customers
F.B. Purity - F.B. Purity is a browser extension / add-on that lets you clean up and customize Facebook.
Wirize - Payment checkout for freelancers
SpaceHey - SpaceHey is a retro social network focused on privacy and customizability. It's a friendly place to have fun, meet friends, and be creative. Join for free!