ClassyTk is an extension of Tk based on the ClassyTcl Object system. It adds a lot of improvements to Tk, ranging from drag and drop support (between Tk apps) and a configuration system to a large set of new widgets and commands, written using the object system. It also contains a GUI Builder that can be used to graphically create interfaces. It is invoked via the cbuild command in the bin directory. There are also some sample (but useable) applications created with ClassyTk: a very useable editor, a calculator, a drawing program, and more.
Esperantilo ("Tool for Esperanto") is a UTF-8 editor with linguistics functions for the language Esperanto, and is also a system for computer aided translation. It contains a spell checker and grammar checker for the Esperanto language. It can translate Esperanto text in different formats to Polish, German, English, and Swedish and from Polish and English. It also supports computer aided translation by interactive machine translation. Translation memory can be used also for any language pairs. It is an XLIFF editor. It supports XLIFF and TMX (Level 1) formats. Machine translation uses direct translation at the syntax level.