Binary, Hexadecimal systems and Hex Editors

Here are some tutorial on hexadecimal system and Hex editors:

Binary and Hexadecimal system

• ROM Hacking - Binary and Hexadecimal Tutorial  (Youtube)
  
• Hexadecimal Tutorial  (Youtube)
  
• Binary, Hexadecimal, Octal,and BCD Numbers (PDF)
  
• Binary, octal and hexadecimal numbers (PDF)
  
• Counting in base 10, 2 and 16 (PDF)
  

Hex editors

• Introduction to Hex Editors and Scripting (Youtube)
  
• Basic Hex Editing Guide
  
• Hex editing: First steps (with FlexHex editor)
  
• Basics of Hex editing (with UltraEdit32 editor)
  

Removed broken links and added more stuff!