Golden - Mapping all human knowledge
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Sutle - Save and organize resources into a directed learning path.
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Self-Defined - A modern dictionary about us.
Apple Numbers - Numbers lets you build beautiful spreadsheets on a Mac, iPad, or iPhone — or on a PC using iWork for iCloud. And it’s compatible with Apple Pencil.