Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Emoji Keyboard - Allows searching and inserting into other applications near thousand emojis.
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.
Neon L.E.D. Keyboard - Neon L.
AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.
Fleksy - Fleksy is the #1 private, white-label virtual keyboard SDK, enabling companies to create unimaginable products.