LX WordNet/Natural Language Processing Server is a Node.js server
offering easy-to-use lexicon and text processing features. Without
any configuration the server can be used to query the WordNet database
and perform general text processing on document collections or text
message streams like Twitter using a simple REST API. Text processing
functions include tokenization, part-of-speech tagging, named entity
recognition, and sentiment analysis.

All features available via the REST API are also available from a
Javascript API. Advanced users can also create their own custom text
processing web service, expanding the core features provided
out-of-the box.