Bitrix24.com – Social intranet platform for all business operations

  Bitrix24 is a social intranet platform for small businesses and this  service is 100% free to small companies (those with 12 employees or fewer). Essentially Bitrix24 is Yammer (social enterprise) plus BaseCamp (project management) plus Zoho (CRM) plus DropBox (file sharing and online doc management) and a few minor things (calendars, planners, work reports, gantt charts, [...]