We’ve been testing some of the many iPhone applications that aim to help you save and manage money. Banks are developing a growing number of apps for the iPhone, but we’ve focused on some free, nonbank offerings.

Here, some of our favorites:

Mint offers a version of its popular budgeting tool. We like it because, like the Mint.com site, it puts all your accounts — checking, savings, loans and investments — into one place. Users can get a real-time snapshot of their financial lives and set up alerts should accounts run low. This one is handy to consult before making purchases.

SnapTell uses the camera feature of the iPhone to snap pictures of books, CDs and videogames to comparison shop online. This application can accurately identify a book by its cover and links you to reviews and prices from Amazon, eBay and other retailers. We saved $10 on a Philip Roth book because SnapTell showed us that a cheaper used copy was available online.

Yowza!! combines a Global Positioning System with coupons, popping up coupons for nearby retailers. Good idea, but it needs some work — we found only the same Container Store offering week after week in a robust Manhattan shopping district. However, we later found some coupons for a complimentary sample-size shampoo at a nearby Kiehl’s. The application also tracks your cumulative savings.

Zillow, the real-estate search site, offers a free application that uses a GPS to pinpoint your location and displays a map showing nearby homes on the market and properties recently sold. It’s fantastic for house hunters, or just the real-estate curious. At one point, we stood across the street from a home and could view a listing with images of the interior, plus contact info for the real-estate agent.

And anyone who has endured the agonizing math after a large group dinner will appreciate Tip-U-Late, a calculator that can split a check, along with tax and tip, among multiple people by using simple math. This one saves both money and time spent squabbling over the bill.