AutoHotkey unleashes the full potential of your keyboard, joystick, and mouse. For example, in addition to the typical Control, Alt, and Shift modifiers, you can use the Windows key and the Capslock key as modifiers. In fact, you can make any key or mouse button act as a modifier.
Compatibility: The change most likely to affect backward compatibility is that floating point numbers stored in variables now have higher precision. Scripts that rely on tiny differences in precision would either need to be reviewed and updated, or have their compatibility improved by using "SetFormat Float" (e.g. SetFormat, Float, 0.6) anywhere in the script. "SetFormat Float" disables the higher precision, but gives up some of the new, faster floating point performance.
Performance: The main theme of this release is faster performance. Almost all scripts should run faster -- especially those that make heavy use of expressions and integer math/comparisons (which may run up to three times as fast). To achieve the full benefit, a script either should avoid using SetFormat or should use SetFormat's fast mode.
The full log can be found over here.
Tools and Utilities
Product page: here