Emoji Keyboard - Allows searching and inserting into other applications near thousand emojis.
Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Neon L.E.D. Keyboard - Neon L.
Swiftkey - SwiftKey keyboard allows for seamless typing and adapts to the way you type, so you can spend less time correcting typos and more time saying what you mean.
Fleksy - Fleksy is the #1 private, white-label virtual keyboard SDK, enabling companies to create unimaginable products.
AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.