Unixstickers by Sticker Mule - Stickers for fans of unix, software, coding and open source
Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions
Acrylic Charms by Sticker Mule - Add some charm to your life.
Purecss - A set of small, responsive CSS modules that you can use in every web project.
Chumpu iMessage Sticker Pack - Animated Chumpu cartoon stickers for iMessage
Materialize CSS - A modern responsive front-end framework based on Material Design