Smart Scroll X offers smooth and easy iPhone-like scrolling:

* Super Wheel makes your scroll wheel smoother, faster and more
comfortable. And it lets you reverse scrolling on the Mac to match your
iPhone. Try it!

* Grab Scroll gives you a Hand tool to easily move (and “throw”!) any
window’s contents.

Other features include Universal Scroll Keys that let you scroll from the
keyboard, FileMaker Pro and AppleWorks enhancements, and more.

Smart Scroll X is shareware ($19 single user license) and runs on Mac OS X
10.3.9 or newer (PPC/Intel).

More info: (http://www.marcmoini.com/sx_en.html)

Download:

10.5:
(http://www.marcmoini.com/SmartScrollX_2.7.5b2_Leopard.dmg)

10.4:
(http://www.marcmoini.com/SmartScrollX_2.7.3.dmg)

Version 2.7.5b2 – December 14, 2007
* Partial support (Cocoa applications only) for Mac OS X 10.5 Leopard.
* Preference pane access fixed.
* For Mac OS X 10.4 Tiger, please use Smart Scroll X 2.7.3

Version 2.7.3 – December 13, 2007
* Fixes for Camino, Google Earth, FileMaker Pro, horizontal scrolling in
Carbon applications. Thanks to Justin Thomas!
* Various other fixes and improvements.