Apple's iLife is the former name given to the suite of Apple Creativity Apps used by Mac iOS and OS X, which consists of iPhoto, iMovie and GarageBand. The programs in this suite are used for editing and publishing photos, movies and music.
Although Apple officially started using the new name after iLife 11 was released, the suite is still commonly referred to by its original name. In fact, many people consider the latest version, released in Oct. 2014, to be iLife 13. The first version of iLife was released in 2003, followed by a new version, iLife '04, '05, '06, '07, '08 and '09, every year from 2004 through 2009.
The version iLife 13 only contains three applications, but every version prior to iLife 11 also contained iWeb and iDVD. These programs were also available in the DVD release of iLife 11 but not in the Mac App Store.
As of 2014, the Apple Creativity Apps are only available through the Mac App Store because Apple has discontinued selling DVD versions of these programs. The updated version of these applications comes preloaded on any new Mac product, while upgrades from older versions are also available at no charge through the App Store.