A new MacBook comes with iLife '09 which includes iPhoto, iMovie, GarageBand, iWeb, iDVD.
The current version of the iLife software (iPhoto, iMovie, iWeb, iDVD and Garageband) is pre installed on all new Macs.
All Macs come with Apple's iLife software which includes iPhoto.
All Macs come with the iLife software suit that includes Garageband.
Mac OS X 10.6 (Snow Leopard) will not include iLife '09 as this is a separate product. New Macs that come with Snow Leopard installed will have iLife included.
A boxed copy of Mac OS X (Leopard) does not include iLife which needs to be purchased separately. Apple does produce a Mac Box Set which includes Leopard, iLife and iWork. iLife is included with all new Macs.
iPhoto, part of iLife, comes preinstalled on current Macs. It is capable of pretty advanced editing, and organizes your photo library. If you need the features of Adobe's Photoshop software you need to purchase and install a copy on your Mac.
The last version of iLife that will run on Macs running Mac OS X 10.3 (Panther) is iLife '05.
iMovie is part of the iLife suite by Apple. All macs come with iLife. You may purchase upgrades if your version becomes obsolete. However there is no iMovie for windows and the program is not free.
preinstalled software
Yes.
In 2012
Boxed versions of Mac OS X do not include the iLife suite which is available separately.
iMovie comes installed with all new Macs. The latest version can be purchased as part of the iLife software pack. The latest version of iMovie requires an Intel-based Mac, Power Mac G5 (dual 2.0GHz or faster), or iMac G5 (1.9GHz or faster) it will not work on older Macs. iMovie is also available at Best Buy (in the Apple section) and the Apple Store as part of the iLife package.