Is it possible to change keyboard key assignments?

[BestUsername]

When I press "~" on my keyboard, I want this "≈" symbol to appear instead. Is there a way I can replace the "~" with "≈" ?

 

[archer]

Hi,

Try this. Might be of some help.

 

[Callender]

Personally I use KeyTweak where I have one broken arrow key. I remapped it.

KeyTweak Download - Softpedia

Note: No longer available from the developer and no longer supported. However it still works.