xgrk provides the possibility to change keyboard mapping with alt-shift or meta-shift combinations or by clicking on the flag image. You will be able to write greek in X programs like netscape or xedit. Keycodes are auto-loaded on startup so it should work with all unices and keyboard layouts. Fonts are not included.
Screen Message displays a given multi-line message as large as possible, fullscreen and black on white. You can specify the text when launching sm, or edit it while the program is running. It is useful to send messages across a room (e.g., during a university lecture). For fast startup, it is recommended that you bind it to a key in your Desktop Environment.