AMaDa Blocklist:
http://amada.abuse.ch/blocklist.php
BLADE:
http://www.blade-defender.org/eval-lab/
Clean MX:
http://support.clean-mx.de/clean-mx/viruses
DNS-BH - Malware Domain Blocklist:
http://www.malwaredomains.com/
DShield:
http://www.dshield.org/ipsascii.html
HoneyWhales:
http://honeywhales.com/results/list
hpHosts Online:
http://hosts-file.net/
Malc0de Database:
http://malc0de.com/database/
Malware Domain List:
http://www.malwaredomainlist.com/mdl.php
Malware Patrol:
http://www.malware.com.br/lists.shtml
MalwareURL:
http://www.malwareurl.com/ip_listing.php
ParetoLogic:
http://mdl.paretologic.com/index.php
PhishTank:
http://www.phishtank.com/phish_archive.php
Project Honey Pot:
http://www.projecthoneypot.org/list_of_ips.php
Scumware:
http://www.scumware.org/
SpyEye Tracker:
https://spyeyetracker.abuse.ch/monitor.php
Sucuri:
http://tools.sucuri.net/?page=tools&title=blacklist
ZeuS Tracker:
https://zeustracker.abuse.ch/monitor.php