API List - A collective list of APIs. Build something.
UProc for Sheets - Boost your sales, marketing and IT tasks from Google Sheets
Abstract APIs - Simple, powerful APIs for everyday dev tasks
Email Verification on Google Sheets - An add-on for email verification directly in Google Sheets
Phantombuster - A marketplace of simple to use no-code APIs
Sheetlist - Discover free Google Sheets for marketing, finance and more