This is the list of people that contributed with w3af, a small summary of what they have done follows their name.

Project leader:
    Andres Riancho
    
Main contributors:
    Alexander Berezhnoy - spiderMan refactoring, new console user interface, plugins
    Facundo Batista - pyGTK user interface

GUI design and usability contributors:
    Eduardo Mercovich - *Incredible* work in design and usability of the GTK user interface. Most of his recommendations still need to be coded.
    Sebastian Ardita - Splash screen and vulnerability icons
    
Contributors from Cybsec:
    Mariano Nuñez DiCroce -  webUi
    Juan Pablo Perez Etchegoyen - htmlFile output plugin
    Lucas Freije - Testing and bug reporting
    Victor Montero - Moral and political support
    Pablo Milano - Bug reporting

Testing:
    Ulises Cuñe - Bug reports and ideas
    Sebastian Garcia (eldraco|en|gmail.com) - A lot of bug reports and good ideas
    
Plugin contributors:
    Sharad Ganapathy - Mark of the web plugin
    Francisco Amato - mod_security evasion plugin
    Josh Summitt - xst plugin
    Constantinos - A lot of small fixes and help
    Viktor Gazdag - eval() plugin
    Eduardo Jorge - Local File inclusion plugin help

Documentation:
    Mike Harbison - Documentation review
    Andy Bach - Documentation review
    Jerome Athias - Users guide translation to French

General:
    Achim Hoffmann (ah|at|securenet.de) - Great ideas and OWASP SoC Reviewer
    Taras P. Ivashchenko <naplanetu!gmail.com> - A lot of BIG contributions.
    Kevin Denver - xmlFile plugin, urlParser extension, bug fixing, testing and more!
    Martin Tartarelli - Hacked around the cmd.aspx file in order to evade AV detection, documentation, and more.

w3af also has one big sponsor, Cybsec, www.cybsec.com