Email Verification on Google Sheets - An add-on for email verification directly in Google Sheets
Dropsource - Mobile development platform for building native iOS & Android apps
Sheetlist - Discover free Google Sheets for marketing, finance and more
GoodBarber - GoodBarber is a mobile app creation platform.
Clearbit Salesforce Prospector - Quickly build targeted lead lists directly in Salesforce
Fuse - Fuse is a UX tool suite for mobile app designers and developers.