Report Phishing Page (like those terrible "update your password" sites):
https://safebrowsing.google.com/safebrowsing/report_phish/
Report site that is hosting malware (like those horrible "update your Flash" sites):
https://safebrowsing.google.com/safebrowsing/report_badware/
Microsoft
Report an unsafe site
https://www.microsoft.com/en-us/wdsi/support/report-unsafe-site
Symantec
Report Phishing Site:
https://submit.symantec.com/antifraud/phish.cgi
