cyn.in alternatives

cyn.in
Open source group collaboration software. Cyn.in combines the capabilities of collaboration tools like wikis, blogs, file repositories, micro blogs, instant discussions and other social applications into a seamless platform. The cyn.in desktop client keeps users updated with its unique activity stream while enabling instant discussions within any document, file or content.
cyn.in alternatives are:
Confluence, SharePoint, Yammer, Alfresco, Plone, Drupal