bcWebCam - Scan barcodes and QR Codes with your computer web cam
Wondershare PDFelement - All-in-one PDF editor
ZXing - Barcode Scanner for Android
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Barcode to PC: Wi-Fi scanner - Turn your smartphone into a real barcode scanner
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.