Now, for all the people that are into cracking then this is a basic tool for cracking software. Just like a Hex Editor, but you can use the jmp function etc.
Also, this is a tool you need when you get in to cracking software, I used it when I got into it.
http://www.hiew.ru/
You might wana get a cracked version:

* file size is limited to 150000 bytes
* no 64bit dis/assembler
* no ini-file processing
* no ordinal names
* no loading/storing keyboard macros in file
* no loading/storing crypt scripts in file
* crypt 32bit
* …