Synapse – Application Launcher
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.
Install Synapse on ubuntu using PPA
Open the terminal and run the following commands
sudo add-apt-repository ppa:synapse-core/ppa
sudo apt-get update
sudo apt-get install synapse pastebinit