What are some alternatives?
When comparing Onboard on-screen keyboard and Florence Virtual Keyboard, you can also consider the following products
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.
Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Microsoft On-Screen Keyboard - On-Screen Keyboard is a utility that displays a virtual keyboard on the screen and allows users...
AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.
Multiling O Keyboard - Super lightweight (~ 1/3 MB) yet flexible and powerful soft keyboard.