udemy-dl - Download courses from Udemy for personal offline use
Trilium Notes - Trilium Notes is a hierarchical note taking application.
Podia - Podia is your all-in-one digital storefront. The easiest way to sell online courses, memberships and downloads, no technical skills required. Try it free!
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Codecademy's Learn C++ - Learn one of the most powerful languages in the world! 👾
STUDIO - Next generation design tools for digital products.