The SpotBugs plugin for security audits of Java web applications
The OWASP ZAP core project
Powerfull download accelerator and video downloader
Open source download manager
Owasp Zap Live CD
Web and mobile application security awareness/training platform
Find web application vulnerabilities the easy way!
Monitoring of websites with spider and email notifications
Capable to "Crawl" a site and return a report of all links from it
Open Source Penetration Testing / Ethical Hacking Framework