- Anki - Program which makes remembering things easily. Intelligent flashcards
- Memrise - Learn vocabulary, languages, history, science, trivia and just about anything else easily using flashcard techniques.
- CodeWars™ - Practice challenges for programmers
- Symbolab - Free step by step math solver
- Lyx - A word processor for LaTeX
- Overleaf - LaTeX in the cloud
- Tableau - Create amazing data visualizations
- UPC Database - The canonical place on web to lookup barcode items
- Ninite - Auto-update applications with ease
- Zotero - Organizes sources, provides citations, and lets you take notes
- Mendeley - The best free way to manage your research. Organize, share, discover. Great for when writing a paper, it manages all your referencing in many different available notations
Courses and Tutorials
- Class Central - Discover free online classes from top universities like Stanford, MIT, and Harvard
- MIT Open Courseware
- Yale Open Courseware - Video lectures from the class with the in-class experience. Lots of classes over lots of subjects.
- Stanford Open Courseware
- EDX - Free courses from the best universities. Diplomas available for a fee
- PatrickJMT - Free and abitiously useful math videos for the world!