FireCAT (Firefox Catalog of Auditing exTensions) is a mindmap collection of the most efficient and useful Firefox extensions oriented application security auditing and assessment. FireCAT is not a replacement of other security utilities and software as well as fuzzers, proxies and application vulnerabilities scanners.

Download
http://www.firecat.fr/download.html

JonDo is an open source and free-of-charge program for Windows, Linux and MacOS X. It hides the user's IP adress behind an anonymous IP address. In contrast to other anonymizers (VPNs, anonymous proxy servers), the user's anonymity stays protected even against the providers (operators) of the anonymous IP address.

Download
http://anonymous-proxy-servers.net/en/software.html