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Burp Suite is an integrated platform for performing security testing of web applications. Its various tools work seamlessly together to support the entire testing process, from initial mapping and analysis of an application's attack surface, through to finding and exploiting security vulnerabilities.

w3af is a Web Application Attack and Audit Framework

Audit your website security and web applications for SQL injection, Cross site scripting and other web vulnerabilities with Acunetix Web Security Scanner. Download Free Edition!

A fully automated, active web application security reconnaissance tool. Key features: High speed: pure C code, highly optimized HTTP handling, minimal CPU footprint - easily achieving 2000 requests per second with responsive targets. Ease of use: heuristics to support a variety of quirky web frameworks and mixed-technology sites, with automatic learning capabilities, on-the-fly wordlist creation, and form autocompletion.

IronWASP (Iron Web application Advanced Security testing Platform) is an open source system for web application vulnerability testing. It is designed to be customizable to the extent where users can create their own custom security scanners using it. Though an advanced user with Python/Ruby scripting expertise would be able to make full use of the platform, a lot of the tool's features are simple enough to be used by absolute beginners.

Websecurify is a powerful web application security testing environment designed from the ground up to provide the best combination of automatic and manual vulnerability testing technologies.

Find security vulnerabilities right from your browser. Experience the next generation security tools without the need to install any additional software

Intruder is a proactive security monitoring platform for internet-facing systems.

Welcome to PatrolServer. We scan your server real-time for outdated software and exploits. All delivered by mail and an easy to use dashboard.

Ammonite is a web application security scanner extension for Fiddler. Ammonite detects common vulnerabilities such as SQL injection, OS command injection, cross-site scripting, file inclusion, format string vulnerabilities, and buffer overflows. Ammonite includes unique features that make it particularly well suited for penetration testers and security professionals.