However, if you realize this claim is just a "grasping at straws" by the mainstream media to attack the credibility of alternative news sites, then you might be interested in the complete list of these sites posted by ZeroHedge, one of the alleged "propaganda tools". Below we have reproduced the entire list.
ZeroHedge has highlighted some of them, meaning (we assume) that they are the most reliable and used by ZeroHedge itself. However you should check out as many as you can. If you want to "think for yourself" in the end you need to trust your own judgment on these matters.