Want to protect your phone? Lookout does just about everything. It provides security against mobile viruses, malware and hackers, backs up your data and even locates your lost or stolen device on a map from the Web. And if you can't find it, you can use Lookout to make your phone "scream" or simply wipe out all the data on it. Free.
Keep your Android phone running at its fastest with this app. Memory Booster optimizes our phone's memory by recovering memory leaks, flushing temporary libraries and defragmenting your phone's memory. Free.
Don't like the stock browser that came with your Android phone? The Dolphin Browser HD adds a boatload of features, including multiple tab viewing, full multitouch gestures, a thumbnail "flick" menu, gesture-based search and URLs, a YouTube downloader and browser extensions. Free.
Looking for more robust browser support? The Opera Mini web browser is super fast and adds features like tabbed browsing, multiple home page tiled Web sites, sync bookmarks between your desktop and phone and more. Free.
The app adds just about every calculator function you can think of to your Android phone, allowing you to put your scientific calculator in the drawer forever. Free.
36) News Republic
Are you a news junkie? Now your Android device can help you stay on top of all the breaking news with this app. Its feeds include many of the top news agencies, and it will organize relevant stories for you through its interactive interface. Free.
This app replaces your traditional home screen with one that shows summary information for SMS, Gmail, phone calls, Calendar, Google Reader, Stocks and Twitter, making seeing all your important information at once a snap. Free.
This highly useful app uses your phone's location to find the nearest ATMs. You can even sort according to criteria including: drive through, 24-hour service, wheel chair accessibility and surcharge fees. Free.
This app provides comprehensive, real-time gas prices in your area (US and Canada) with maps. Users who pitch in by reporting gas prices in their area can win free gas. Free.
40) Dial Zero
Need to get in touch with customer service and don't want to wait on hold? Dial Zero maintains an index of more than 600 companies and how to cut through their automated answering services to get a live human being in no time. Free.
This app from CBS Interactive turns your Android phone into a television. Use it to watch video, including full episodes, from CBS, The CW, CNET, ET, Showtime, CBS News, CBS Sports and more. Free.
Start listening to free, personalized Internet radio on your Android. This app brings Pandora off your computer and puts it on your phone. It's fully integrated with Pandora on the Web. You can listen to all your existing stations and create new ones on your phone too. Free.
Still hunting for a Twitter client for your Android phone? Twicca offers a massive number of features with a slick, minimalist UI. Users can add a series of plug-ins to customize Twicca to their own needs. Free.
Use Wikipedia often? Wikidroid formats Wikipedia articles for your device with a sleek interface. It even includes voice search and bookmarks. Free.
45) ESPN ScoreCenter
Get comprehensive ESPN sports coverage on your Android phone with this app. It provides near-real-time scores and schedules. Free.