Feb 17 2008
Smart Scroll X is a Preference Pane that brings smooth iPhone-like scrolling to the Mac desktop. For MacBook users, that means by activating 2-finger scrolling in the Keyboard & Mouse preferences, you can flick down webpages and multi-screen lists right from your trackpad.
Partial Leopard compatibility was added in the v2.7.5b3 update released this weekend.
A single user license costs USD$19.