Unless you're totally fluent in multiple languages, odds are you're going to need a translation book for your globe-trotting trips. Or, you could just download Word Lens (Free; $5 for language packs). This ingenious app translates whatever it sees through your iPhone's camera in real time, letting you decipher signs, fancy menus, or just figure out what the packaging on your favorite Mexican salsa actually says.
Ever wanted to dabble in the dark arts of DJing, but lack the funds to buy a room full of specialized equipment? Now all you need is an iPad. Djay ($20) is a full-on virtual DJ system for the iPad, offering two virtual turntables (unfortunately sans microphone), mixer, tempo, and EQ controls, direct access to your iPad's music library, AirPlay integration, BPM analysis with automatic beat and tempo matching, the ability to record your sets, an Automix mode, and support for 4.2 multitasking, so it can keep playing the background while you sneak in a couple stages of Angry Birds.
Does the world really need another social network? Well, the guys behind Path (Free) would probably answer "yes, and no." Touted as "The Personal Network," Path is a new photo sharing service tailored to posting real-time images from your phone's camera — currently limited to iPhone — and sharing them with up to 50 of your closest, most trusted confidants. It lets you see who's looked at your photo, and uses tags for people, places and things to help you organize memories from your life. So it really is another social network — except when it isn't.