I am looking for a plugin that makes it possible to leave a comment at my homepage with your Facebook account. If possible also with other social networks such as Twitter, G+, Linkedin etc, but Facebook is the most important. The plugin should also leave the possibility to add a comment as a guest by adding a name and an e-mail, just like the standard commenting in wordpress. This option is for people that don't have, or don't want to use, a facebook account.
Now, I know there are many plugins for this, and I have tried more than one, but here is my problem: When I press the "leave a comment with your facebook account"-button, It opens a new window and asks me to install (or accept or add or what you call it) an app in Facebook. I don't want that. I know I will loose a lot of comments if people have to install an app just to write on my homepage.
Is this possible, does this plugin exist?