Zazu is a new open source productivity app, that allows developers to be in the drivers seat. Unlike other solutions, there are no built in integrations, so every plugin has the full scope of what Zazu has to offer.

Zazu App - a fully extensible and open source launcher for hackers, creators and dabblers. It comes with sane defaults to make it useful out of the box. But everything can be changed to fit your needs: http://zazuapp.org/