Gnome-Do for Gentoo
If your buddies are using Mac OS you may have seen Quicksilver in action. Now there’s a recreation of the same concept for GNOME called GNOME Do. I’ve created an ebuild for Gentoo which is in my git overlay (you can get it as graaff through layman).
Note that it doesn’t yet work properly with the brand-new metacity compositor due to the (fixed) GNOME bug 504876.