Description: Duolingo is a free language-learning platform that offers over 100 total courses across more than 30 languages. The bite-sized lessons make it easy to learn a new language through fun, quick activities on your phone, tablet, or computer.
Type: software
Pricing: Freemium
Description: python(x,y) is an open-source mathematical plotting and data visualization library for the Python programming language. It provides a simple interface for creating 2D plots, histograms, power spectra, bar charts, errorcharts, contour plots, etc.
Type: software
Pricing: Open Source