Dropbox is one of those applications that has immediate integrated into my workflow.  The concept is simple enough: a folder where you can copy files.  Those files are synced with Dropbox, and any computer where you have Dropbox installed, those files will also sync there. It’s not a new idea by any means.  But, I cannot recall an easier to use version of it for the cost, which is free.

Getdropbox.com