START
- Demonstration from the MIT InfoLab Group of its natural language question answering system, developed by Boris Katz.
- http://start.csail.mit.edu/

AnswerBus
- Answers natural language questions in English, French, Spanish, German, Italian or Portuguese.
- http://www.answerbus.com/

Language Computer Corporation
- Includes a demonstration of the company's search technology designed to provide direct answers to simple factual questions.
- http://www.languagecomputer.com/

BrainBoost
- Question answering engine that accepts natural language queries.
- http://www.brainboost.com/

Asked
- Automatically answers factual, natural language questions by providing short responses with support information. Questions can be entered in English, Japanese, Chinese, Russian and Swedish. (Research project by Ed Whittaker in the Furui Laboratory at Toky
- http://asked.jp