Scherlokk - Mac OS X application. Simple and user friendly, Scherlokk will find your media and missed files - quickly.
Cairo-Dock - Cairo-Dock / GLX-Dock 3. 4 is now available. Cairo-Dock 3. 4 is finally released! One year after the 3.
Slingscold - Slingscold is a lightweight application launcher similar to Launchpad in Mac OS X.
Gnome-Pie - Gnome-Pie is a circular application launcher for Linux.
kupfer - Kupfer is a command tool heavily inspired by https://alternativeto.
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.