Pantera is actually using an improved version of SPIKE Proxy and is a project under the umbrella of OWASP.
It’s aiming to be a more automated method for testing Web Application Security.

Features

User-friendly custom web GUI. (CSS): Pantera itself is a web application that runs inside the browser and can be customized using CSS by the user. [...]

Exploit-Me is a suite of Firefox web application security testing tools. Exploit-Me tools are designed to be lightweight and easy to use. Instead of using a proxy like many web application testing tools, Exploit-Me integrates directly with Firefox. It currently consists of two tools, one for XSS and one for SQL Injection.
The Exploit-Me series was [...]

As you all seem to pretty interested in Inguma, there’s something else similar called w3af – the fifth BETA was released a while back and the team are now working on the sixth.
w3af is a Web application attack and Audit Framework. The project goal is to create a framework to find and exploit web application [...]

A pretty cool tool was released a while back called w3af ( Web Application Attack and Audit Framework ), a fully automated auditing and exploiting framework for the web. This framework has been in development for almost a year and has the following features:

Audit

SQL injection detection
XSS detection
SSI detection
Local file include detection
Remote file include detection
Buffer Overflow [...]