What are some alternatives?
When comparing i-nigma Reader and QR Droid, you can also consider the following products
Barcode Scanner - Barcode Scanner for Android
QuickMark - QuickMark makes everything possible.
MKH Barcode Reader - This tool can be used to scan QR codes on your PC or tablet. Note: a webcam is required.
Obsqr - obsqr is an open-source, fast and lightweight QR scanner for Android.
ZBar bar code reader - ZBar bar code reader
NeoReader - The NeoReader is a universal barcode scanning app that transforms your mobile phone into a barcode scanner, allowing access to mobile web content by scanning codes from virtually any medium