YouLikeHits - YouLikeHits is an online service that brings results within seconds.
Email Verification on Google Sheets - An add-on for email verification directly in Google Sheets
LikesPlanet - Get Facebook likes, Twitter Followers, YouTube Subscribers, Comments, and Shares.
Sheetlist - Discover free Google Sheets for marketing, finance and more
Linkcollider - Link Collider is a web-based service that is designed to grow your online business, social media networks, and personal blogs.
Clearbit Salesforce Prospector - Quickly build targeted lead lists directly in Salesforce