Developer Resources OWASP Guides OWASP Top 10 Secure Coding Dojo (Workshop/Lab) Code Review Guide Mobile Application Security OWASP Cheat Sheet Series (includes platform-specific) Other guides Hacksplaining - Learn to Hack, Learn to Protect Yourself Rate Limiting - Limiting brute force attacks and other high-traffic problems. Platform-Specific Best Practices .NET Security Cheat Sheet PHP Security Cheat Sheet AJAX Security Cheat Sheet Java/Oracle Critical Patch Updates and Security Alerts Django (Python) Security Tips Ruby on Rails Cheat Sheet HTML5 Security Cheat Sheet