I started a project to increase relationships/friendships between avatars.
It's extremely easy to use and it works linked to an external webserver:
1) Avatars join with a click and are temporary indexed outside SL
2) The webserver finds matches (male/female) and sends private notifications inworld
A COMPLETELY FREE copy of the personal HUD or public PANEL can be downloaded.
inworld:
http://slurl.com/secondlife/Spry%20Island/177/76/22
on xstreetsl for 0 L$ HUD :
https://www.xstreetsl.com/modules.php?name=Marketplace&file=item&ItemID=1640285
on xstreetsl for 0 L$ PANEL :
https://www.xstreetsl.com/modules.php?name=Marketplace&file=item&ItemID=1640804
PS* I started this project only to test LSL linked to an external webserver by using ASP pages.