FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Fluid - Turn Your Favorite Web Apps into Real Mac Apps.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
WebCatalog - Run your favorite web apps natively
Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Coherence X - Coherence X4 is a powerful tool that allows you to turn any website into a chromium-based, isolated, native application on your Mac.