In addition to iCloud, there are a number of other cloud services available to Mac and iOS users. Dropbox, Box.net, and Google Docs all come to mind immediately and each offers its own set of features. Another option that isn’t discussed so much by Apple users is Microsoft’s SkyDrive.
Although SkyDrive has offered a basic iOS app and web access from Macs and iOS devices, the functionality has been a bit limited. Newly leaked details of an OS X SkyDrive app, however, indicate that Microsoft may be planning to compete against iCloud on Apple’s home turf.