Paros proxy

Paros proxy is a free and open source MITM proxy software with built in spider and vulnerability scanner. Paros proxy is built using Java, thus works on all operating systems where Java is available.

There are separate builds of ZAP for Linux, Mac OS X and Windows platforms. Functionality of ZAP can be extended using ZAP extensions.

Features

 * Intercepting Proxy
 * Active and Passive scanning facility
 * Spider
 * Ability to extend the features using plugins and extensions
 * Graphical user interface
 * FIlters