Algo by AirDev - Turn a Google Sheet model into a web app in 5 minutes
SheetHacks by Polymer Search - Discover the best tips & tricks for Google Sheets & Excel
SpreadShare - Explore community-curated spreadsheets.
SyncWith for Google Sheets - Data from any app into Google Sheets, reports & dashboards
Sheetsu - Turn Google Spreadsheet into API
Coefficient.io - Automatically Sync Google Sheets with your Business Systems. No-code reporting and analysis tool.