SyMenu - SyMenu is a portable menu launcher and Start Menu replacement to organize your applications quickly...
DockbarX - DockbarX is a standalone dock that groups and launches applications.
PortableApps.com - PortableApps.com is a website offering many free, commonly used Windows applications that have been...
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.
PStart - PStart is a simple tray tool to start user defined applications.
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.