Profile Hopper - Chrome Extension to Growth Hack LinkedIn
Clearbit Connect - Clearbit Connect is a free extension that surfaces actionable information on the people who email you.
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Sheetsu - Turn Google Spreadsheet into API
Ampliz Sales Buddy - Data to power your business