Patrick O. Perry. Author, copyright holder, maintainer.
Finn Årup Nielsen. Copyright holder, data contributor.
AFINN Sentiment Lexicon
Martin Porter and Richard Boulton. Contributor, copyright holder, data contributor.
Snowball Stemmer and Stopword Lists
The Regents of the University of California. Contributor, copyright holder.
Strtod Library Procedure
Carlo Strapparava and Alessandro Valitutti. Copyright holder, data contributor.
WordNet-Affect Lexicon
Unicode, Inc.. Copyright holder, data contributor.
Unicode Character Database