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.
TortoiseSVN - The coolest interface to (Sub)version control
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
SnailSVN - Similar to Tortoise SVN for Windows but integrated into Finder
Nextcloud Contacts - The Nextcloud contacts app is a user interface for Nextcloud's CardDAV server.
Xversion - Super easy enterprise class version control.