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.
dualscreen-mouse-utils is a set of two useful utilities for dual screen setups (e.g. :0.0 and :0.1). mouse-switchscreen switches the cursor between X screens and remembers the last used position. mouse-wrapscreen wraps the mouse cursor from one screen to the other on the specified edge, even when the screens are configured to be apart and would normally be uncrossable.
QuickTile is a simple attempt to duplicate the basic functionality of WinSplit Revolution for users who don't like the Compiz Grid plugin. It should work on any X11 desktop with PyGTK 2.2+, a window manager that supports the modern range of NETWM hints, and (if you want internal keybinding) python-xlib.