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Yes we do. It's called Synapse and it's actually pretty similar.

https://launchpad.net/~synapse-core/+archive/ppa

And synapse-core adds what functionality, exactly? I gave up trying to figure that out from the ppa site and Googled it instead: https://encrypted.google.com/search?hl=en&lr=&tbo=d&...

Gnome Do, Unity dash, KDE launcher, ...

I've been using kupfer for a while now. You should try it out.

Another vote for kupfer here, I'm a huge fan of it, and install it instantly on receipt of a new linux workstation .. terrific tool, lots of nice plugins and very usable.