I’ve saved the best for last. Evernote has made an appearance on my Windows Phone 7 phone (Nokia Lumia 710), my iPad, my Mac, my Windows machines, and my Dell Streak 7, replacing Microsoft’s OneNote as my main way to document projects. My favorite ploy is to use my smartphone to snap pictures of server serial numbers, machine internals, shipping documents, rack layouts, and more, then pull them into Evernote for annotation. Being able to annotate that same picture without transferring it to the PC and to look up any of my notes on any of my platforms make Evernote the one app that I just couldn’t do without.
Compatibility: iPhone and iPad; iOS 3.0 or later