Frhed is an binary file editor for Windows. It is small but has many advanced features like ability to load big files partially.
Did its job, no muss no fuss. I marked it down because of the user interface: it does not display rows of data 16 bytes at a time which makes it somewhat confusing to locate the data you want. All hex editors I've used have aligned on a 16 byte (or multiple) boundary, ideally with an extra space between groups of 4 and 8. Other than that, it's fine.