GridMove - GridMove - A window management tool that can quickly arrange your windows into desktop grids.
DockbarX - DockbarX is a standalone dock that groups and launches applications.
WinDock - WinDock is a window manager ideal for large, or multi-monitor setups. Features:
Synapse - Synapse is a semantic launcher written in Vala that you can use to start applications as well as find and access relevant documents and files by making use of the Zeitgeist engine.
Preme for Windows - Speeds up your window switching.
Gnome Do - Simple, sleek, swift, smart. Do. GNOME Do allows you to quickly search for many items present on your desktop or the web, and perform useful actions on those items. GNOME Do is inspired by Quicksilver & GNOME Launch Box.