World's best HEX editor, needed for many modding-related tasks such as M2 editing and WoW.exe patching.
Installation:
Download the appropriate installer and the Keygen archive.
Install 010 Editor.
Acquire a registration key from one of the key generators provided.
Open 010 Editor
Go to Tools - Register, and use the key.
Go to Tools - Options, and untick 'Check for Updates/News'.
Go to Templates - Template Repository - Status, and untick 'Check for Updates'.