Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Gnome-Pie - Gnome-Pie is a circular application launcher for Linux.
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.
Cairo-Dock - Cairo-Dock / GLX-Dock 3. 4 is now available. Cairo-Dock 3. 4 is finally released! One year after the 3.
Listary - Listary is a revolutionary search utility for Windows
Ulauncher - Fast application launcher for Linux. Custom shortcuts for web URLs and scripts.