From NLTK

Many people have contributed to NLTK:

Project Leaders:

Steven Bird

Edward Loper

Ewan Klein

— These people manage the code repository and website, and oversee the strategic direction of the project. They are listed as "Project Administrators" in the list of NLTK developers.

Developers: Greg Aumann, Haejoong Lee, Nitin Madnani, Joshua Ritterman, Stuart Robinson, Jussi Salmela, Eric Smith, Rob Speer, Tiago Tresoldi.

— These people contribute to specific initiatives, as agreed with the project leaders; typically they maintain code in nltk_contrib or contribute documentation, or help with packaging. They are included in the list of NLTK developers.

Contributors: Robert Berwick, Nathan Bodenstab, Phil Blunsom, Steve Cassidy, Chen-Fu Chiang, Jinyoung Choi, Andrew Clausen, Lucas Champollion, Trevor Cohn, James Curran, Selina Dennis, Nikhil Dinesh, Rebecca Dridan, Jean Mark Gawron, Yoav Goldberg, Brent Gray, Eduardo Pereira Habkost, Yurie Hara, Will Hardy, Peter Hawkins, Amy Holland, Baden Hughes, Edward Ivanovic, Thomas Jakobsen, Chris Koenig, Nitin Madnani, Christopher Maloof, Carl de Marcken, Mitch Marcus, Robert Marshall, Margaret Mitchell, Eric Nichols, Martin Thorsen Ranang, Carlos Rodriguez, Thomas Skardal, Peter Spiller, Oliver Steele, Claire Taylor, Steven Tomcavage, Tiago Tresoldi, Peter Wang, Charlotte Wilson, Beracah Yankama, Patrick Ye.

— These people have contributed source code or documentation to NLTK.