Here you can test if a site is listed in any of the available black lists:
http://www.robtex.com/dns/DOMAINNAME.html
http://www.robtex.com/ip/IPADDRESS.html
http://hosts-file.net/?s=DOMAINNAME
https://www.trustedsource.org/en/feedback/url
http://www.siteadvisor.com/sites/DOMAINNAME
http://www.trustedsource.org/TS?do=feedback&subdo=query&q=DOMAINNAME
http://www.malwaredomainlist.com/mdl.php?search=DOMAINNAME&colsearch=All&quantity=50
http://www.google.com/safebrowsing/diagnostic?site=http://WEBSITEURL
http://www.mywot.com/en/scorecard/DOMAINNAME