Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.

GeoGebra CAS Calculator - Free online algebra calculator from GeoGebra: solve equations, expand and factor expressions, find derivatives and integrals

Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.

Dr. Geo - Dr. Geo, a software to design & manipulate interactive geometric sketches.

RingCentral Video - Live life unlimited. Free video meetings and team messaging in one app that works the way you do.

GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.