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The primary aim of DOAB is to increase discoverability of Open Access books. Academic publishers are invited to provide metadata of their Open Access books to DOAB. Metadata will be harvestable in order to maximize dissemination, visibility and impact. Aggregators can integrate the records in their commercial services and libraries can integrate the directory into their online catalogues, helping scholars and students to discover the books.

"Indexing 665,737 open source projects"

Terrier is a highly flexible, efficient, and effective open source search engine, readily deployable on large-scale collections of documents. Terrier implements state-of-the-art indexing and retrieval functionalities, and provides an ideal platform for the rapid development and evaluation of large-scale retrieval applications. Terrier is open source, and is a comprehensive, flexible and transparent platform for research and experimentation in text retrieval. Research can easily be carried out on standard TREC and CLEF test collections. Terrier is written in Java, and is developed at the School of Computing Science, University of Glasgow.

Jumper helps you find the best, most valuable, information fast. No more searching through countless distributed silos.Now you can find & share the best content, media, or data regardless of format or location in one search box. Our collaborativesearch engine uses peer and social-networking principles to make hard to find information more easily discoverable. If youhave complex search requirements Jumper delivers more focused information, faster, across the complete information landscape, inside and outside the firewall, based on your unique needs.

"DMOZ (from directory.mozilla.org, an earlier domain name) was a multilingual open-content directory of World Wide Web links. The site and community who maintained it were also known as the Open Directory Project (ODP). It was owned by AOL but constructed and maintained by a community of volunteer editors."

OpenFTS (Open Source Full Text Search engine) is an advanced PostgreSQL-based search engine that provides online indexing of data and relevance ranking for database searching. Close integration with database allows use of metadata to restrict search results.

"Black Duck Open Hub Code Search, the world's largest, most comprehensive code search engine"

"Carrot2 is an Open Source Search Results Clustering Engine. It can automatically organize small collections of documents (search results but not only) into thematic categories."

Query Multiple Services Simultaneously   Extra browser windows will open for each of the services checked below.  Symbols: {syntax}; 

"Use this prototype to find images that you can use and remix across several open archives. Give us your feedback to help us design a front door to the commons."

Free, full text, quality controlled scientific and scholarly journals, covering all subjects and many languages

" Citizendium, a wiki for providing free knowledge where authors use their real, verified names. We welcome anyone who wants to share their knowledge by writing and improving articles on virtually any subject. Expert authors can be recognized with a special role, but membership is open to all."

Search Facebook public timeline outside Facebook Find out what people on Facebook are talking in public. You don't have to log into Facebook.

Discover the Universe of Open Educational Resources

Open/Free Educational Resources for Higher Education.

novoseek is a biomedical search engine developed by bioalma for searching published knowledge in biomedical literature.novoseek indexes biomedical literature from Pubmed, Free Full Text Publications from Open Access Journals in PubMedCentral and US grants from over 75 institutions including the U.S. National Institute of Health (NIH), National Science Foundation, U.S. Department of Agriculture, and Center for Disease Control and Prevention (CDCP) using a text mining technology that enables the identification of key biomedical terms. To perform this ambiguous identification, our technology takes into account external available data as well as contextual term information.

PiciShare is a great alternative to your standard flickr search. This is your chance to browse Flickr in an open environment, don't miss out!

Open access to 646,209 e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics