Gate - General Architecture for Text Engineering

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.