Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
Grammarly Keyboard - If you want your mobile writing to truly shine with its polish, you need the Grammarly Keyboard
Onboard on-screen keyboard - An onscreen keyboard useful for tablet PC users and for mobility impaired users.
Hacker's Keyboard - Are you missing the key layout you're used to from your computer when using an Android device?
Hot Virtual Keyboard - A replacement for Windows' built in virtual touch keyboard.