Sandcat is a portable browser based on the Chromium project. The program is targeted at penetration testers - people who test websites for security holes - but could also be useful for developers, or anyone else who would like a little more low-level control over their browsing.
Exploring the Sandcat browser then reveals more useful functionality. Enable "Live Headers", for instance, and you can watch as your browser tries to access various components of a page. There's an option to view the current page cookies. And a User Agent Changer means you can have Sandcat identify yourself as Chrome, IE, Firefox, Safari or Opera, or customise the user agent to whatever you like.
You also get the usual developer tools, which allow you to view every element of your page and watch how it affects performance.
Tor integration means that, in theory at least, you should be able to browse anonymously in a couple of clicks (Sandcat just crashed when we tried this, but this is a beta: you might be luckier).
And you get a lengthy list of features oriented more to penetration testers. You can load and run custom scripts, for instance, there's a request editor, a fuzzer extension, CGI scanner scripts, encoding and decoding tools, and more.
None of this functionality gets in the way, though. And so if you want to explore everything Sandcat has to offer, you can do so. But if you simply want a browser with easy cookie viewing and user agent configuration (or whatever), then it might also appeal: there's something here for most people.