One of the major components of SlakteKit project is its handwriting recognition input method. It's a usable fully open source solution, consists of Tegaki model, Zinnia engine and a simple QML Canvas stroke detection.
With a patch to maliit-keyboard, and my qtdeclarative5-zinnia-plugin package, it's now being ported to Ubuntu Touch:
I'll keep polishing the keyboard layout and settings of maliit. You can follow me on Twitter or the discussion thread at Ubuntu App Developers for updates.
Happy hacking,
penk