AlstraSoft E-Friends – Run your own online social networking community just like Friendster. Members create their own personal friends network, meet new friends, dating and join groups
From the site:
AlstraSoft E-Friends is an online social networking software that allows you to start your own site just like Friendster and Tribe.net. The E-Friends software allows members to connect to people in their personal networks and community, creating a new online interactive resource that is based on a trusted network of friends and associates on the internet