iPhone/iPod touch only: Free, no-sign-up file sharing service drop.io is a great place to stash files. With the Droppler iPhone app, it becomes an essential tool for storing and grabbing anything on the go. Droppler isn't free, but at $US1.99, it serves up a lot of useful functions. drop.io is a pretty unique service amongst the many online storage competitors; it only offers 100MB per "drop," which can contain multiple files, but those files can be shared, linked, controlled, and otherwise used as semi-disposable cloud space. Connecting your iPhone to Drop.io through Droppler gives you, for instance, the ability to quickly upload photos for easy grabbing on your desktop, rather than to click the photo, hit "Email," type an address, wait to send, and repeat ad nauseum. You can stash away links and notes to check on your iPhone later, like grocery lists, and images and screenshots from your iPhone can later be faxed, sent, or otherwise manipulated. Droppler also lets you record voice memos directly into a drop.io space, but my iPod lacks the iPhone's mouthpiece to properly show it off. The major limitation of Droppler is really an iPhone limitation—you can't download or store files that the device doesn't work with or recognise, like .zip archives. Other than that, it's a real convenient means of keeping web-based notes and links accessible anywhere, offloading files for quick download, and otherwise extending your phone's space. Droppler is $1.99, requires an iPhone or iPod touch running at least the 2.2 software.