ZXing - Barcode Scanner for Android
Manatee Works - Manatee Works offers barcode decoding solutions.
Barcode to PC: Wi-Fi scanner - Turn your smartphone into a real barcode scanner
CodeREADr - A smart barcode scanner app for fast barcode scanning with the device camera or accessory. Create barcode scanning workflows and sync data in the cloud.
bcWebCam - Scan barcodes and QR Codes with your computer web cam
BarCodeWiz OnLabel - Barcode and QR Code and Barcode