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SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

Possibly the most detailed CVE security vulnerability source on the internet. You can search for software and hardware vendors, products and exact version numbers of products and easily view security vulnerabilities related to them. You can view ...

Juniper Networks offers high-performance network solutions that help service providers, enterprises, and public sector organizations create value and accelerate business success.

SecurityFocus is designed to facilitate discussion on computer security related topics, create computer security awareness, and to provide the Internet's largest and most comprehensive database of computer security knowledge and resources to...

The Exploit Database - Exploits, Shellcode, Vulnerability reports, 0days, remote exploits, local exploits, security articles, tutorials and more.

Security-Database.com is a free web service solution that offer real-time vulnerabilities alerts and notifications.

Exploit4Arab Vulnerability reports, 0days, remote exploits, local exploits, security articles, tutorials and more.

Free software downloads at DownloadPlex.com, the most comprehensive source for free-to-try software downloads on the Web include windows, drivers, linux, mac and mobile

Security mailing list archive for the Nmap lists, Bugtraq, Full Disclosure, Security Basics, Pen-test, and dozens more. Search capabilities and RSS feeds with smart excerpts are available

Comprehensive CVE vulnerability database that integrates all U.S. Government publicly available vulnerability resources. Repository of information technology security content automation.