EduDo - EduDo is a video discussion platform
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Courseroot - Biggest online course database on the web
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
TeenUp - A learning platform designed for teens by teens
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.