Doll Up Stickers - Dress up your messages.
Bobble Stickers for iMessage - One selfie, Unlimited Stickers!
Poolga - Art for iPhone and iPad created by selected illustrators
Bitmoji - Turns your avatar into stickers and emoji
StickerSDK.Mojitok.com - In-app store of animated emojis, GIFs, and stickers with personal curations for 10x engagement and revenue - as seen on Samsung Galaxy.
GIF Search on Twitter - Get ready to search and send GIFs in tweets and DM's