31 October
gDisk - Free Gmail applications for Mac OS X: a software that turns your GMail account into a portable hard drive so you can always have your important files accessible accross the Internet.
Live Mesh - Free 5GB online backup & sync: free online file storage & media library also; synchronization between multiple computers & mobile devices; client software available for Windows, Mac & mobile systems; private sharing.

19 October
SugarSync - Free 2GB online backup: free online file storage & photo album also; stream music without storing the songs on your computer or mobile phone; for every friend you introduce to SugarSync, they'll give you both 250MB of bonus space up to a limit of 5GB; client software available for Windows, Mac & mobile systems; available through Windows Explorer; easy file sharing with Public Links.