As of 2014, what is the best paid or unpaid Android app to scan business cards?

I'd suggest modify the title a bit, as IT IS 2015 now :) I recommend the Whova app (https://play.google.com/store/apps/details?id=com.whova.event), which I am a huge fan of. It's totally free! Simply open the app, navigate to "Contacts" tab and choose "Scan a Business Card",  take a snapshot of your  business card, the app will automatically transcribe the card  information into digital format. Further, it gives you more "insights" (e.g. the person's image, bio, social media profiles)  which you'll definitely love. After that you can quickly export all contacts' information and save to your phone, or sync with your computer if you want. BTW, the app has a Batch mode, which means you can kill many cards quickly. Here is its blog announcement you can refer to learn more - https://whova.com/blog/announcing-whova-business-card-scanner-feature/. Also do view this cute GIF to see how it works :)

For scanning business cards, I use ScanCard. It is a professional business card scanning application. It is able to scan the business cards you have, and use the built-in OCR engine to retrieve contacts info from those cards after scanning. You can choose to modify and save it to your contacts after the OCR engine finished its work.For me, it really works well.