There are lots of ways to pay for things with your phone. But Venmo has a smart mixture of clean design, ease of use, and social functions that give it an edge. It doesn't do much, but it does let you easily send and receive payments from friends. And unlike other payment systems, it has momentum. It's usually the app people ask about when the group is splitting up the check.
Calibre is the giant of ebook management, and this app is the perfect (ahem) companion for it. With just a few clicks, you can add any book from your computer to your eReader over USB or Wi-Fi. You can also store your ebooks on the cloud for easy access from wherever you are. What's so surprising is how well it works, and how easy it is to use. If you've got a lot of ebooks and are ready to cast off the shackles of Amazon, this is the app for you. Droid Apps