Mighty Mouse allows you to customize your cursors with style - and it
does so on the fly, without modifying any system files! Moreover, it
allows you to customize all kinds of cursors available in the system -
Arrow, I-Beam, Alias, Copy, Move and the Wait cursor. You can animate
any cursor and import pre-made ones. Edit the cursors with the
simplicity of copy-paste and drag-and-drop, then hit Apply, and you
got it! (from publisher web page via the Wayback Machine)

DL #1 contains v. 1.0, released in 2003.

DL #2 contains v. 1.1.3, released in 2004. It requires Mac OS X
10.2?10.3

DL #3 contains v. 1.2, released in 2005. It requires Mac OS X
10.2?10.4 and is the last version compatible with Mac OS X 10.2

DL #4 contains v. 1.2.2, released in 2005. It requires Mac OS X
10.3?10.4

Downloads 1?4 are for PPC Macs only.

DL #5 contains v. 1.3, released in 2006. It requires Mac OS X
10.3?10.4 and is not compatible with Mac OS X 10.5 or above. It is the
first version that is a Universal Binary (PPC/Intel).

DL #6 contains a registration plist. Copy the plist to the
~/Library/Preferences folder to register v. 1.2.x or 1.3. This does
not work for v. 1.0 or 1.1.3.

DL #7 contains a collection of custom made cursors for Magic Mouse
that I have gathered from Wayback Machine archives of the old Unsanity
and ResExcellence web sites.

DL #8 contains v 2.0 beta 1. It's compatible with Mac OS X 10.5
PPC/Intel (Universal Binary), and possibly works with 10.6 (it's been
a long time, if someone wants to test it). I also have this currently
working with the newly released [10.5.9 "Sorbet Leopard"][1] mod. The
registration plist from DL 6 also works with this version.

DL #9 contains a collection of custom made cursors for Magic Mouse
from Wayback Machine archives of the ResExcellence web site. Those
already in DL #7 were removed.

Compatibility
Architecture: PPC x86 (Intel:Mac)

  [1]: http://macintoshgarden.org/apps/sorbet-leopard