Hello, I don't actually play Diablo 3, but I have friends that do. They complained that because of the way the game is set up, it requires a LOT of left finger clicking of the mouse to attach creeps. They complained that after a while it hurt their wrists/hands. I'm a software developer and I saw the opportunity to help them with this.
I made a small simple application called QuazKeys, which allows the binding of a mouse button to a key on your keyboard. Not only that, but it will automatically press the left click button for you. So you would hold the key down, and it would left click for you every 1/10 of a second.
I figured there would be other people with the same problem which is why I'm posting here.
The bad news is that is costs, only £1 though... Sorry about that, I have rent to pay! But after asking a few people who beta tested it, they said it would be well worth the cost.
You can view the application and FAQ on the products website: