Web.com has merged the SnapNames and NameJet inventories. So when you do a search for NameJet, SnapName domains will show up, and vice versa.
DomCop is an expired domain search tool. You can find domains based on Ahrefs Domain Rating, Moz Rank, Domain Authority, Majestic Trust & Citation Flows, Similar Web Rank, Alexa Rank, SEMRush Rank and Traffic Data, Domain Scope Traffic data and Social Statistics.