Relevant sources

• standards and guidelines

  • at W3C

    • ATAG
    • Authoring Tool Conformance Evaluations
    • Selecting and Using Authoring Tools for Web Accessibility
  • The Any Browser Campaign
  • Google's research into Web authoring statistics
  • Stichting Bartiméus Accessibility
  • Webrichtlijnen
  • Drempels Weg

• Web Publishing Systems

  • OpenSourceCMS
  • htmlArea.com
  • OSCOM
  • Wiki Engines
  • The CMS Matrix
  • Wikipedia

• legislation

  • US Rehabilitation Act, Section 508
  • UK Disability Discrimination Act
  • Germany's BITV
  • Spain's LSSICE
  • The Netherlands' Besluit Kwaliteit Rijksoverheidswebsites
  • more countries’ relevant legislation, tracked by W3C’s WAI. (Unfortunately some links there seem to have died. The EU’s link rot for example is impressive. Also remarkable: it appears that the new german administration of Angela Merkel has, in shuffling departments’ responsibilities, simply killed existing links. There should be laws...)
  • Peter Krantz's Index of Government Guidelines for Web Sites aims to provide an up to date overview of countries' legislation and governmental Web publishing guidelines.

• political

  • June 2006, EU aims to ensure compliance of 100% of public websites to common standard and practices for web accessibility by 2010
  • EU targets for interoperability (about halfway down the page)