What are some alternatives?
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Gis.XL - Online maps in Excel
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Spreadsheet Booster - Import external data directly into your spreadsheets
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Keikai - Fastest web spreadsheet for Big Data