The following are Indexers known to exist but I have not been able to gather much information about them yet. As soon as I complete my research the indexers will be posted to the appropriate list. If you have any information or better yet, if you are a member of one of these Indexers, I'd appreciate any info you can offer.
babiak is an nZEDb site that is currently invite only.
beyondnor.ml is a Newsnab site that is currently invite only.
nzb.tv is a Newsnab site that appears to be invite only.
nzb.dan.tv is a Newsnab site that appears to be invite only.
Bluemoat is a Newsnab site that appears to be either broken or under maintenance.
ABHDTV is a VBulletin Forum. Registerations appear to be closed.
BinaryInvasion is a Forum site that is currently under maintenance.
ng4you is a French site with closed registrations. Must be sponsored by an existing member.
iwillfearnoevil is a Newsnab site that appears to be invite only.
Enigma is a nZEDb site that appears to be private.
unknown is a nZEDb site that appears to be invite only.