Entry of characters via an input tablet, integrated into the fcitx input method framework. Your strokes are drawn on screen as you write.

fcitx-tablet should be easily extensible for different tablet drivers. Currently it supports some tablets based on a common chip from Gotop, see the wiki page on hardware support for details.

fcitx-tablet is easily extensible for different handwriting recognition engines. Currently it supports zinnia and forking to an external (potentially proprietary) recognition engine.

See a demo video here