Philosophy
- Stanford Encyclopedia of Philosophy, IEP or nLab Philosophy - Philosophy Encyclopedias / Search
- Philosophy Bro, LibreTexts Philosophy, Reasoned, TheDailyIdea or PhilosophyBasics: Philosophy Resources / Learning
- Wireless Philosophy: Philosophy Videos
- 1000-Word Philosophy: 1000-Word Essays on Philosophical Topics
- Untools: Better Thinking Tools
- Brainkit: Learn Helpful Principles
- Art of Manliness: Develop Life Skills
- VisualizeValue: Life Lesson Visualizations
- Sketchplanations: Explanation Sketches
- IEoP, YouLogicalFallacyIs, FallacyFiles or LogicalFallacies: Learn about Logical Fallacies
- RationalWiki: Pseudoscience Refutation Wiki
- YourBias.is: Learn about Biases
- Philosophy Stack Exchange: Philosophy Forum
- Kialo: Debates / Discussion
- Umsu: Analytic Tableaux Generator
- Proofs: Natural Deduction Proof Checker
- PropCalc: Propositional Logic Calculator
- ModalLogic: Model Logic Playground
- Logitext: Sequent Calculus Tutorial
- WikEnigma: 'Known Unknowns' Wiki
- The Trolley Problem Game: The Trolley Problem
- Social Engineers: Social Engineering Guides