Sigster is a search engine that finds hash quicklinks on the web. These quicklinks helps you download virus-free and fake-free files from various p2p networks. Sigster finds Ed2k, Sig2dat, Magnet and BitTorrent links, which means that you can search for files in the following networks:

FastTrack (Kazaa, iMesh, Grokster)
eDonkey2K (eDonkey, eMule, Shareaza)
Gnutella (Shareaza, Limewire, Morpheus, Bearshare, Xolox)
BitTorrent