Studio Neat's clever Glif looks like a musical note from the side, hence its name. But that's not the cool thing about it -- Glif snaps onto your iPhone, then lets you securely screw that device onto a tripod or other camera-mounting system, so you can take better photos.
They say the best camera is the one you always carry. For most of us, that camera is the iPhone. Now, no one's saying an iPhone will take better pictures than a DSLR, but it does make for an awfully decent point and shoot, and has a ton of options (nay, apps!) for instantly sharing your photos. These accessories will help you make the photos and videos you take with your iPhone even better, and help close the gap between your iPhone and your other cameras.