Indicator Synapse is a Spotlight Alternative, developed by Tom Beckmann.
How to Install Indicator Synapse (Spotlight Alternative) on Ubuntu 14.04 LTS or Linux Mint 17 run this commands in terminal:
$ [sudo] add-apt-repository ppa:noobslab/apps
$ [sudo] apt-get update
$ [sudo] apt-get install indicator-synapse
After installation once you log out and log in then you can see indicator tool.
This also having a shortcut to use
Alt+Super+Space
it is not working with this shortcut you can go withAlt+F10
.
It also runs on 16.04.
System Settings > Software&Updates > Other Software > find and click noobslab/apps repository > Edit > change Distrbution value to "trusty".
Then sudo apt-get update and sudo apt-get install indicator-synapse. That's all.