| AusCERT | | Australian Computer Emergency Response Team. Advisories and tools. |
| Bugtraq | | Independent source for security vulnerabilities, alerts, and threats. |
| Center for Internet Security | | Non-profit enterprise whose mission is to help organizations reduce the risk of business and e-commerce disruptions resulting from inadequate technical security controls. |
| CERT Coordination Center | | Studies Internet security vulnerabilities, provides incident response services to sites that have been the victims of attack, publishes a variety of security alerts, researches security and survivability in wide-area-networked computing, and develops information to improve site security. |
| Citadel Security | | Vulnerability remediation software which prevents networked machines that have been off the network for some time from gaining access until the software has applied necessary patches. Also offer policy management and automatic logoff tools. |
| Computer Incident Advisory Capability | | CIAC publishes security bulletins and virus and hoax information. They provide computer security assistance to US Department of Energy (DOE) sites. |
| CVEbrowser | | CVE browser is a Java Web search engine for the Mitre CVE vulnerability dictionary. |
| DeepSight | | Fee based security alert service by Symantec. |
| Internet Alerts | | A Subject Tracer Information Blog developed and created by Marcus P. Zillman, M.S., A.M.H.A. for monitoring Internet Alerts. |
| ISS X-Force | | Security alerts, advisories, and alert summaries from ISS. |
| Open Source Vulnerability Database | | Searchable database of vulnerabilities. Offers data for download in XML format as well as via website. Details of how to submit new vulnerabilities, database schema and FAQ. |
| Patch Management Forum | | Mailing list facilitates networking and information exchange related to patch management: announcements, testing, verification, operations processes, and vulnerabilities. |
| PatchEasy | | Patch management tool that helps secure systems by remotely managing service packs and hotfixes. Conduct research, take inventory, deploy updates and validate installations to networked machines. |
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