I created a opensource software with the name suosuoban. It is an illustrating tool, with ideas coming from this paper http://www-ui.is.s.u-tokyo.ac.jp/~takeo/p

I created a opensource software with the name suosuoban. It is an illustrating tool, with ideas coming from this paper http://www-ui.is.s.u-tokyo.ac.jp/~takeo/papers/watanabe_uist2007_bubble.pdf http://www-ui.is.s.u-tokyo.ac.jp/~takeo/papers/watanabe_uist.... It is in https://github.com/henryscala/suosuoban https://github.com/henryscala/suosuoban. It is implemented in QT, so it can be run in multiple OS.