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The Lemur Project develops search engines, browser toolbars, text analysis tools, and data resources that support research and development of information retrieval and text mining software. The project is best known for its Indri search engine, Lemur Toolbar, and ClueWeb09 dataset.
Whoosh is a fast, featureful full-text indexing and searching library implemented in pure Python. Programmers can use it to easily add search functionality to their applications and websites. It has support of Fielded indexing, search, scoring, text analysis, storage, Pluggable scoring algorithm, Powerful query language and spell-checker.
Developed at the Web Exploration and Search Technology Lab at the Polytechnic Institute of NYU, under the advisement of Professor Torsten Suel, PolyIRTK provides tools for indexing and querying large document collections. The aim of PolyIRTK is to act as a platform for research into new algorithms for compression/decompression, querying, and indexing techniques. It implements a number of techniques from recent research literature that improves on the efficiency of indexing and querying. PolyIRTK