FreeSearch
From the “about” page:
The FreeSearch project is a search system on top of DBLP data provided by Michael Ley. FreeSearch is a joint project of the L3S Research Center and iSearch IT Solutions GmbH.
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In this project we develop new methods for simple literature search that works on any catalogs, without requiring in-depth knowledge of the metadata schema. The system helps users proactively and unobtrusively by guessing at each step what the user’s real information need is and providing precise suggestions.
A more detailed description of the system can be found in this publication: FreeSearch – Literature Search in a Natural Way.
You can choose to search across:
DBLP (4,552,889 documents)
TIBKat (2,079,012 documents)
CiteSeer (1,910,493 documents)
BibSonomy (448,166 documents)
Enjoy!