FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Pipedream - Integration platform for developers
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Hoist - Hoist is how you integrate - Meet the microservices platform that talks to APIs
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.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.