Acrylic Charms by Sticker Mule - Add some charm to your life.
Unixstickers by Sticker Mule - Stickers for fans of unix, software, coding and open source
Zimit - Configure price quotes for services
Polymail - Native email app for email productivity.
Chumpu iMessage Sticker Pack - Animated Chumpu cartoon stickers for iMessage
Brainyquote - Database of quotations by topic or author.