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Google Books (previously known as Google Book Search, Google Print, and by its code-name Project Ocean) [ 1] is a service from Google that searches the full text of books and magazines that Google has scanned, converted to text using optical character recognition (OCR), and stored in its digital database. [ 2]
Open-source, cross-platform C library to generate PDF files. OpenPDF: GNU LGPLv3 / MPLv2.0: Open source library to create and manipulate PDF files in Java. Fork of an older version of iText, but with the original LGPL / MPL license. PDFsharp: MIT C# developer library to create, extract, edit PDF files. Poppler: GNU GPL
The main academic full-text databases are open archives or link-resolution services, although others operate under different models such as mirroring or hybrid publishers. Such services typically provide access to full text and full-text search, but also metadata about items for which no full text is available.
Apache Lucene. Apache Lucene is a free and open-source search engine software library, originally written in Java by Doug Cutting. It is supported by the Apache Software Foundation and is released under the Apache Software License. Lucene is widely used as a standard foundation for production search applications. [ 2][ 3][ 4]
Project Gutenberg ( PG) is a volunteer effort to digitize and archive cultural works, as well as to "encourage the creation and distribution of eBooks ." [ 2] It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library. [ 3] Most of the items in its collection are the full texts of books or individual stories in ...
Google Play Books, formerly Google eBooks, is an ebook digital distribution service operated by Google, part of its Google Play product line. Users can purchase and download ebooks and audiobooks from Google Play, which offers over five million titles, with Google claiming it to be the "largest ebooks collection in the world".
Searx. Searx ( / sɜːrks /; stylized as searX) is a free and open-source metasearch engine, [ 4] available under the GNU Affero General Public License version 3, with the aim of protecting the privacy of its users. [ 5][ 6][ 7] To this end, Searx does not share users' IP addresses or search history with the search engines from which it gathers ...
CiteSeer X [4] is a public search engine and digital library and repository for scientific and academic papers, primarily with a focus on computer and information science. [4] However, recently CiteSeer X has been expanding into other scholarly domains such as economics, physics and others. Released in 2008, it was loosely based on the previous ...