Drupal
lots of Virtual Community stuff: Weblog Engine, polls, Discussion Forum
written in PHP
Civic Space is a distribution of Drupal for online organizing.
http://www-128.ibm.com/developerworks/ibm/osource/index.html
Acquia, founded by Drupal founder, does commercial support http://ostatic.com/blog/acquia-supporting-the-drupal-cms-adds-200-new-customers
Press Flow is a semi-fork of Drupal providing better Scalability.
It seems that you can run on MsWindows, even with MsSqlServer. (Unlike Word Press, which will work with MsWindows but only wants MySQL for a db.)
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BackLinks: 2004-10-27-DrupalCms | 2004-10-27-DrupalFoaf | 2008-04-07-BigtableService | 2008-07-03-Pinax | 2009-04-30-SternDrupalToWordpress | 2009-10-26-WhitehousegovNowDrupal | 2009-11-06-GoingonEducationalCommunityPlatform | 2009-11-16-ChicagoEvents | 2011-02-14-WhiteHouseUsingOpenAtrium | 2018-03-21-UdellHowWebAnnotationWillTransformContentManagement | 2022-11-02-AxbomTheManyBranchesOfTheFediverse | CivicSpace | DruPal | HowardRheingold | RailsOnMacOsx
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