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GATE excels at text analysis of all shapes and sizes. It provides support for diverse language processing tasks such as parsers, morphology, tagging, Information Retrieval tools, Information Extraction components for various languages, and many others. It provides support to measure, evaluate, model and persist the data structure. It could analyze text or speech. It has built-in support for machine learning and also adds support for different implementation of machine learning via plugin.
It has family of products: GATE Developer: An integrated development environment for language processing components bundled with a very widely used Information Extraction system and a comprehensive set of other plugins.
GATE Teamware: A collaborative annotation environment for factory-style semantic annotation projects built around a workflow engine and a heavily-optimized backend service infrastructure.
GATE Embedded: An object library optimized for inclusion in diverse applications giving access to all the services used by GATE Developer and more.
The Semantic Vectors package uses a Random Projection algorithm, a form of automatic semantic analysis. Other methods supported by the package include Latent Semantic Analysis (LSA) and Reflective Random Indexing. Latent Semantic Analysis (LSA) is a theory and method for extracting and representing the contextual-usage meaning of words by statistical computations applied to a large corpus of text. This library is used in semantic analysis and text mining.
The S-Space Package is a collection of algorithms for building Semantic Spaces as well as a highly-scalable library for designing new distributional semantics algorithms. Distributional algorithms process text corpora and represent the semantic for words as high dimensional feature vectors.
ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. Twitter search uses ANTLR for query parsing, with over 2 billion queries a day.
Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems. It could crawl and extract information from File system, Websites, Mail boxes and Mail servers. It supports various file formats like Office, PDF, Zip and lot more. Metadata information is extracted from image files. Aperture has a strong focus on semantics, metadata extracted could be mapped to predefined properties.
SMILA is an extensible framework for building search solutions to access unstructured information in the enterprise. Besides providing essential infrastructure components and services, SMILA also delivers ready-to-use add-on components, like connectors to most relevant data sources. Using the framework as their basis will enable developers to concentrate on the creation of higher value solutions, like semantic driven applications etc.
Apache PDFBox is an open source Java PDF library for working with PDF documents. This library allows creation of new PDF documents, manipulation of existing documents and the ability to extract content from documents. It provides support for adding bookmarks, fonts, text extraction, Encryption, PDF printing and lot more.
Ghostscript is a rendering and conversion engine for page description languages, including Postscript and PDF. It has ability to convert PostScript language files to many raster formats, view them on displays, and print them on printers that don't have PostScript language capability built in.
MARF is a general cross-platform framework with a collection of algorithms for audio (voice, speech, and sound) and natural language text analysis and recognition along with sample applications (identification, NLP, etc.) of its use, implemented in Java.
OpenPipe is an open source scalable platform for manipulating a stream of documents. A pipeline is an ordered set of steps / operations performed on a document to convert from its raw form to something ready to be put into the index.
The operations performed on documents include language detection, field manipulation, POS tagging, entity extraction or submitting the document to a search engine.
iText is one of the popular and widely used PDF library. It is used to generate PDF documents dynamically. Mostly web developers will love it to generate PDF documents and reports based on data from an XML file or a database and serves it to the browser. It has support of adding bookmarks, watermarks, Encryption, Form filling and lot more.