Is there a shell-independent search tool like Dash?

view story

http://askubuntu.com – The only thing I will miss after moving to LXDE from Unity will be the Unity Dash. Its functionality, not the piss-poor performance that is. So here's my question. I know there is synapse but AFAIK it only returns text, without large-sized thumbnails of files etc. Related question: Any search tool for LXDE menu? (HowTos)