An Israeli entrepreneur has set up a social network called Neshama. It has a slight twist: It's for dead people.
Neshama started as a project to preserve and record the details carved on gravestones in Israel.
The site, founded by Shelly Furman Asa, allows people to upload pictures of graves and makes them them searchable by name.
Asa wants the site to be a way for family and friends to add memories and experiences of their dead loved ones. There are some 120,000 on there right now.
Initially, Neshama just took shots of graves in six cemeteries in Israel, but he wants to add more.
Asa says he spent several hundred thousand shekels, or at least £30,000, building the project.
This is the grave of Ofra Haza, a famous singer, at Yarkon Cemetery near Tel Aviv, one of the participating cemeteries.
Here's an example of a memorial page.
Doesn't Facebook already allow people to create memorial pages?
Memorialised Facebook accounts look slightly different and have their contact details removed. They also don't appear in search results and can't be added to your friends list.
You also can't log in a Facebook memorial account - even if you have the password and even though the dead person can still receive private messages.
You can create a tribute page to your heart's content however.
So in effect it's more a device for people to remember the dead than a supernatural social network. If nothing else, this could be a useful tool for historians and linguistic researchers.
Some people don't like Facebook's approach to handling the data and passwords of the dead and this is a huge and growing issue: in a digital age, who controls someone's legacy when they're gone?
How we handle the whole issue of death on social media is something we haven't figured out yet - but as the Facebook generation gets older it's one we're going to have to confront.