Google Labs runs a web “hackme” application on Google Apps (infosec)

Google Labs runs a web “hackme” application on Google Apps that is free to use and provides a host of atypical web vulnerabilities to exploit.

https://google-gruyere.appspot.com/

From the website:

This codelab is built around Gruyere /ɡruːˈjɛər/ - a small, cheesy web application that allows its users to publish snippets of text and store assorted files. "Unfortunately," Gruyere has multiple security bugs ranging from cross-site scripting and cross-site request forgery, to information disclosure, denial of service, and remote code execution. The goal of this codelab is to guide you through discovering some of these bugs and learning ways to fix them both in Gruyere and in general.

Good exercises for web developers, infosec geeks and the security curious. A little easier to use than having to set up VMWare, java, etc for other hackmes.