1. Amazon Mechanical Turk. https://www.mturk.com/. Amazon Mechanical Turk. https://www.mturk.com/.
2. Aspect and Sentiment Unification Model. http://uilab.kaist.ac.kr/research/WSDM11/. {accessed 21-Jan-2014}. Aspect and Sentiment Unification Model. http://uilab.kaist.ac.kr/research/WSDM11/. {accessed 21-Jan-2014}.
3. Bugzilla. http://www.bugzilla.org/. Bugzilla. http://www.bugzilla.org/.
4. LingPipe. http://alias-i.com/lingpipe/. LingPipe. http://alias-i.com/lingpipe/.
5. Stanford Topic Modeling Toolbox. http://nlp.stanford.edu/software/tmt/tmt-0.4/. Stanford Topic Modeling Toolbox. http://nlp.stanford.edu/software/tmt/tmt-0.4/.