Access WolframAlpha's computational knowledge engine from your phone with this app. Also available for free via the WolframAlpha Web site, the app calculates the answers to complex mathematic and scientific problems in an instant. The app version adds a keyboard with all manner of mathematic and scientific symbols to make entering queries a snap. Paid: $1.99.
This app allows you to log, index and search all manner of information, from notes to audio to photos. For instance, you can take a photo of a white board and Evernote will recognize the text in the photo, index it and then allow you to find it later by entering a search term from the information on the white board. It even synchs with the Web. Free.
EverPaper is a simple but excellent Instapaper client. It doesn't support folders yet, but it's under constant development. It also syncs with EverNote. Free.
Yelp for Android determines your current location and then lets you search for nearby businesses, read reviews and so on. It also lets users filter by "Price," "Open Now," "Special Offers" and "Hot on Yelp." Free.
ActionComplete is a robust task manager. It is built around projects you create, which are made up of individual actions that serve as milestones in the project. The app is based on the Getting Things Done (GTD) methodology created by David Allen in his book: Getting Things Done: The Art of Stress-Free Productivity. Free.
23) SMS Backup +
This app automatically backs up SMS, MMS and call log entries to a separate label in your Gmail account. Free.
Centralize all your voicemail boxes, including mobile, home and office, on your Android phone with this app. It can receive and display FAXes too. Free.
This handy app lets you track all your packages in one place. Carriers supported include: Apple, Fedex, UPS, UPS Mail Innovations, Amazon.co.uk, Amazon.com, Amazon.de, DHL Express National (Germany), DHL (Germany), DPD Standard (Germany), GLS (Germany), Hermes, TNT, TNT International (Netherlands), TNT National (Netherlands), OnTrac Shipping, LaserShip, Posten (Norway), Post (Austria), Post (Switzerland), Posten (Sweden), USPS, DHL (USA), DHL Express (GB), Home Delivery Network (GB), Japan Post Int. Mail, CNE Express, Royal Mail, Spee-Dee Delivery (USA), Parcelforce. Free.
This is an excellent, plain but functional Google Reader client with built-in syncing for off-line reading. Free and paid. The free version features ads. NewsRob Pro goes for $7; it removes the ads and adds exclusive features for power users.
27) Read It Later
A simple, reliable tool that adds Instapaper to your sharing menu, so you can quickly tag articles as you browse. Free.
Get yourself organized with this todo list app. It features tagging, timers, reminders, smart task sorting and even tracks partial progress. You can sync your todo list with Remember the Milk, which can sync with Gmail. Free.
Manage your money and keep track of your budget while on the move using Mint. It gives you up-to-date information on your accounts and lets you edit transaction info right on your phone. And it's password protected to make sure your information stays safe. Free.
This editor/viewer for Google Documents allows you to create, edit, view, import, export, send documents and sync them with your Google Docs account. Free.
This Microsoft Office productivity suite for Android devices allows you to view and edit Word, Excel and PowerPoint files with integrated access to multiple remote storage providers. Paid: $15.
This app offers Exchange/Outlook sync for your Android! It works with Exchange 2003/2007 and allows you to sync your e-mail, contacts and calendar. It's available for a free five-day trial. After that, a license costs $19.99.
Dropbox is a client for the Dropbox cloud-sharing file storage service. It makes it easy to get files onto your phone without explicit synching. You can add files to it from any of your computers and then access them from any other computer or phone.
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.
35) RepliGo Reader
A PDF reader that can be used to view Gmail PDF attachments, online PDF documents or PDF files saved to your media card. It features a reading view that reformats pages into a single column, and offers support for embedded fonts, PDF bookmarks and text search. Paid: $4.95.