Hi Nima, Robert
take a look at 23 Photo Sharing - http://www.23hq.com. According to the site, 23hq is "a tool to share, annotate and archive their life experiences through photos - and to allow them connect and stay in touch with their friends, relatives and contacts".
As i could see from tech forums posts at http://www.23hq.com/forums/, OpenACS is the basis for the entire site. The team behind the tool is here http://www.23hq.com/23/about
