What are the free information extraction software packages?
Wikipedia: Information extraction: Free or open source software and services:
- General Architecture for Text Engineering “General Architecture for Text Engineering”, which is bundled with a free Information Extraction system
- OpenNLP Apache OpenNLP is a Java machine learning toolkit for natural language processing
- OpenCalais Automated information extraction web service from Thomson Reuters (Free limited version)
- Machine Learning for Language Toolkit (Mallet) is a Java-based package for a variety of natural language processing tasks, including information extraction.
- DBpedia Spotlight is an open source tool in Java/Scala (and free web service) that can be used for named entity recognition and name resolution.
- Natural Language Toolkit is a suite of libraries and programs for symbolic and statistical natural language processing (NLP) for the Python programming language
- See also CRF implementations