Fluid - Turn Your Favorite Web Apps into Real Mac Apps.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
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.
Web2Desk - Web2Desk is a tool to convert your favorite websites to Desktop app in just one click.
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.