Synapse hasn't been updated in over a year and forked versions haven't been updated in a while either. See discussion https://answers.launchpad.net/synapse-project/ question/665416
Synapse works perfectly. It is the launcher I like the most. Nevermind it has not been updated in a while: it's simplicity ensures functionality remains unhindered.
I was a long time Kupfer user, then all of a sudden it stopped to work on multiple platforms, so I had the look for an alternative.
Even while I was still using Kupfer I tried a lot of alternatives including Gnome-Do, Launchy and other similar software, none of which could suitably replace and even greatly surpass Kupfer.
Synapse is by far the best keystroke launcher I came across. It has unparalelled features, like locate any file, launch any website, has great design and is very easy on resources. Simple, clean and robust.
I was looking for something to replace gnome-do, and let me tell you synapse has filled that space and more. I've had no issues with it at all, did I mention it is FAST! The interface is very simple and clean, just what I was looking for in a launcher.
Our users have written 3 comments and reviews about Synapse, and it has gotten 113 likes