A web application designed for social networking, group collaboration and network organizing
Crabgrass is a software libre web application designed for social networking, network organizing and group collaboration. Our goal is to create communication tools that are tailored specifically to meet the needs of bottom up grassroots organizing.

The internet may herald a deep change in democratic communication, but the internet is simultaneously the most effective tool for mass surveillance ever devised. Crabgrass is a secure alternative to for profit social networking and organizing platforms.

last updated on:
March 24th, 2011, 8:47 GMT
license type:
AGPL (Affero General Public License) 
developed by:
Riseup Labs
ROOT \ Office \ Groupware
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What's New in This Release:
  • This is a small release with some important fixes. An XSS issue in the chat has been fixed.
  • Please upgrade as soon as possible.
  • It has a new way to see user and group activity statistics, the ability to have group wikis open or closed by default, the ability for site admins to disable the profile invisibility option, an updated media player, and autocomplete drop downs for location filtering in directories and for adding geo-locations to your group profile.
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