Warkey is a software for DotA that use for change the item button(that usually in the numpad) to whatever you like. Usually people change it into space, tab, or CapsLock. This is a picture of it :
I have only the version 5.1 that i use. But today the version is up to 6.8.
You can download Warkey for DotA 6.6 at :
The fiture of the warkey 6.6 is :
1. Supports Warcraft 1.26 patch and other previous versions.
2. Active/Disable Enemy/Ally HP bars.
3. Macro Hotkeys.
4. Quick Messages for Allied and All.
5. Disable Left [Win] Key.
6. Very simple and nice interface. Strong function.
7. Set Inventory Keys to, ALT+.
8. Program Hotkeys.
9. Makes mouse cursor stay in window while playing in Window Mode.
10.It does not effect the chat system when you havehotkeys turned on (it will automatically disable warkey when typing). What i have before is still effect on the chat system so we must press home to disable warkey, sometimes it so annoying. So just download the newest of the version.
Using Warkey can help you to use active item. Here are the link to see the list of active item on DotA and how to use it
Hope This can helping you :D.
Have a problem because your operating system is Windows 8? Download the newest version of Warkey : Warkey 6.8 EN for Windows 8