I pushed some ebuild files for on-screen keyboards to my GitHub's repo today.
I want input letters also in the bed, so I search a good on-screen kbd in gentoo repo.
Caribou will become nice in the future, but it is experimental yet.
I couldn't find, so wrote ebuild files for...
Onboard is well-known because it is bundled in Ubuntu, It is based on Python and GTK+3. And, Florence is a nice alternative.
xvkbd is a very light-weight less-dependency kbd.
Nowadays, It is popular to input letters by pointing devices, such as tablet-PCs. So on-screen kbd is much more vital.
Gentoo or GNU/Linux systems should become much more accessible and multi-lingual.
Since I am one of challenged persons, I feel difficulties in accessibility and its multi-lingualization.