Barcode2Win - Transform Android device into a Windows WiFi barcode scanner
ZXing - Barcode Scanner for Android
QuickMark - QuickMark makes everything possible.
Barcode to PC: Wi-Fi scanner - Turn your smartphone into a real barcode scanner
QR Droid - QR Droid Zapper
ConnectUpz - Helping service businesses to connect and grow your customer base by becoming part of of a larger ecosystem.