AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.
ChibiStudio - ChibiStudio is a classy avatar maker that enables its global users to enjoy creating cute chibi characters using this tool on their cell phones and tablets.
Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Gacha Life - Gacha Life is a fabulous tool to make your personal anime styled characters and customize them in the way you want to see, developed in the market by Lunime Inc.
Hacker's Keyboard - Are you missing the key layout you're used to from your computer when using an Android device?
PitzMaker - PitzMaker is a fabulous tool to create your own characters using thousands of combinations.