Phone Smart

CamScanner is a breeze to use, and you can test out the free version via the Market link above. Snap a photo of your document and pull up the cropping tool. The app will auto-detect the edges of the paper, but the slick drag-and-snap guides will help you fine tune the dimensions.

The processing enhancements are smart, and will compensate for low light and bad focus reasonably well. Though the app generates a cropped and toned image, it will also hang onto the original photo -- handy, in case you accidentally cropped your boss name off the letterhead.

The app has built-in integration with Google Docs, Box.net and Dropbox, but for the less fancy among you, its easy to pipe scanned docs straight into email.

The main issue we encountered was with PDF creation. The original image is stored as a JPEG, but the option to convert it to a PDF simply opened the phones default PDF viewer. The file is viewable, but we found no apparent way to save or share.

The paid version promises to make things easier in this department, but you should see how the free version performs on your device before purchasing.

Price: Free / $4.99 for full license and features

This app scans directly to PDF with ease. The interface couldnt be cleaner, and while the cropping tools arent as snazzy as CamScanners, they get the job done.

There are image enhancement features, but in our testing, they werent as precise as CamScanners.

Document Scanner also lets you upload directly to Google Docs, DropBox, and Box.net. It even has Evernote integration -- a nice touch. Scan multiple pages in succession and email them to your hearts content.

The trial version will only last you seven days, but that should give you the time to decide if youre ready to throw down four bucks on the real deal.

Price: Free / $3.98 for full version

Droid Scan works similarly to the aforementioned apps with one exception -- itll send you out to the system camera to grab the image. No big deal -- in reality, the other apps are simply wrapping the native camera with their interface.

Once youre done shooting, Droid Scan picks right back up where you left off and gets down to image processing quickly.

The app has smart edge detection, intuitive (if small) color and contrast controls, and a final menu that lets you select the docs you want to save down as either JPEGs or PDFs (though PDF functionality is only available in the paid version).

Price: Free / $4.99 for PDF functionality

Scan to PDF scores big on interface simplicity. Its easy to start scanning or adjust the settings right from the first screen.

The app jumps over to the system camera by default (though you can adjust this setting), and offers great image processing and enhancement, even in low light.

The cropping function is intuitive but can be awkward -- rather than dragging and snapping at the corners, youll have to pull the edges. Occasionally, your fingers will run out of screen or theyll accidentally drag the entire frame away from the edge. However, This quirk is far from a deal breaker, and the excellent gallery viewer more than makes up for it.

The free version of Scan to PDF does it all, but if you like it and use it regularly, you can show the devs a little love with a $.99 upgrade.

Price: Free / $.99 optional purchase for a job well done

5. PDF Scanner