Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions
Chumpu iMessage Sticker Pack - Animated Chumpu cartoon stickers for iMessage
Purecss - A set of small, responsive CSS modules that you can use in every web project.
Sticker Mule Wall Graphics - Custom wall graphics for your home or office
Materialize CSS - A modern responsive front-end framework based on Material Design
Sticker.Place API - Get stickers for your app