The TMDA homepage has a overview description of what TMDA is and does.
TmdaHistory describes the impetus for the project, its evolution, and who was involved.
TmdaFeatures lists some of TMDA's best attributes and capabilities.
ChallengeResponse describes what challenge/response is and how TMDA uses it.
TmdaTestimonials shows why users like TMDA in their own words.
TmdaInUse lists a number of sites that depend on TMDA.
TmdaPressCoverage contains links to articles from the popular media over the years.
See TmdaDonations if you wish to donate to the project.