ZXing - Barcode Scanner for Android
Cakemail - Email marketing and transactional emails that deliver. Try it for FREE!
Barcode to PC: Wi-Fi scanner - Turn your smartphone into a real barcode scanner
Salesfusion - Salesfusion provides an easy to use marketing automation platform that allows sales and marketing teams to be successful.
bcWebCam - Scan barcodes and QR Codes with your computer web cam
MailChimp - MailChimp is the best way to design, send, and share email newsletters.