SSRP+Online+Research+Resources 

[|Google Scholar]

[|Infotopia]

[|BASE (Bielefied Academic Search Engine)]

[|InfoMine]

[|iSeek]

[|Digital Library of the Commons Repository (Indiana University)]

[|DOAJ (Directory of Open Access Journals)]

[|ERIC (Education Resources Information Center)]

[|Intute] (Articles are pre-2011)

[|OpenLibrary]

[|WebLens] (Good for finding other engines)