Scripting Tools

Anyone know a good free Hex editor for Windows?

I like to follow along ‘manually’ when writing scripts which read over a file, as a way of hunting down bugs, and I use a hex editor to do so when working with binary files. Unfortunately, I just got a brand new laptop, and the editor I used to use is extremely old, and does not work with Vista.

I’d prefer something based on open-source, if at all possible.

My current work-flow involves Cream/Vim for reading files with text-based data (like XML files), and IDLE for writing Python, with a special template .blend file I use when I need to test blender-based functions and editing/reading blend data.