ProxyStrike is an active Web Application Proxy and is a tool designed to find vulnerabilities while browsing an application. It current has SQL injection and cross site scripting modules. This is the Linux / Mac OSX version. Written in Python.
You can download it from the following link: https://packetstormsecurity.com/files/download/65052/proxystrike-v1.0.tar.gz
Source: https://packetstormsecurity.com/files/65052/proxystrike-v1.0.tar.gz.html