Recommended resources

• Cozimo  RECOMMENDED!
  
  Collaboration features are particularly robust so that everyone is on the same page during the process. Users can leave notes directly on images and video frames, track feedback from multiple users and work either in real time together or separately at their convenience.
  
  • Personal accounts are free & include 10MB of storage
  • Paid plans start at $29 per month

Free resources

• LogMeIn: remotely support and access digital information; free basic service
• Project2Manage: collaborative project management solution
• Socialtext: wiki and website collaboration; free basic service
• Team Task: collaborative project management and community website builder
• Yugma: web meeting and collaboration service

Source: Entrepreneur Magazine