Next to Evernote, Dropbox is one of my favorite web-based, cross platform tools. Now that they have added an iPhone app this productivity tool has gotten even better. Now in addition to accessing my files from my Windows, Linux, or OSX I can access my files on go on my iPhone.

If you are not familiar with Dropbox Tyler Wall and I have written about it several times before:
Another take on Dropbox: Syncing Apps
My head is in the clouds but so are my files
Top Free Software

Syncing apps and a password database like Keepass or KeepassX has not gotten even more powerful. Thanks Dropbox!