Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Medium API - Official Medium API
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Bytes - Your weekly dose of JavaScript
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
Characters - Characters makes it easy for writers, designers and developers to access special characters. They are easily found and copied to your clipboard, either as html code or as the character itself.