http://ysshlyesehcnscptskrpai4iupxccuvfcpbxk37kclbs3rsaqmolzaid.onion/darknets.html
The main indexing sites applies minimal amounts of censorship, while others allows the pitch black darkness that cuts deep in your soul, that shit that causes permanent scars and mental trauma. Finding the indexes to obtain addresses from will be the 1st step after installing I2P. I feel some kind of responsibility to not help out here. There are some client software written for I2P, like forums, bittorrent, IRC, et.c.