Vega is a GUI-based, multi-platform, free and open source web security scanner that can be used to find instances of SQL injection, cross-site scripting (XSS), and other vulnerabilities in your web applications. Vega also includes an intercepting proxy for interactive web application debugging. Vega attack modules are written in Javascript, users can easily modify them or write their own. This is the Windows 64-bit version.
You can download it from the following link: https://packetstormsecurity.com/files/download/107368/VegaSetup64.exe
Source: https://packetstormsecurity.com/files/107368/Vega-Web-Security-Scanner-1.0-Beta-Windows-64-Bit.html