This is a commercial managed URL blacklist service.
List and how tos for activating two-factor-authentication for popular public websites
2-Factor-Authentication status for several public web sites
Open source projects to help build and operate more secure systems, along with tools for security monitoring and incident response.
Search Rapid7 database for vulnerabilities and exploits
Download URLs für diverse passwort listen
NIST publications about computer security - The 800 series
Information Database of many hacker (in sense of security)
Rundreisen Vorschläge Island