API Connector by Mixed Analytics - Connect any API to Google Sheets.
Albacross - The world's first free B2B Lead Generation Network. Albacross help companies master their B2B digital marketing with Lead Generation and targeted marketing
SheetHub - SheetHub turns your spreadsheets (either Google Sheets or Excel Online) into a REST-ful JSON API.
Zoho Flow - Zoho Flow is an integration platform for effortlessly connecting web applications and automating complex business workflows.
Hoss - Track and manage third-party APIs
B2B Growth Marketing Bible - A complete guide to B2B lead generation mastery in 2021