If you want to contribute to this list (please do), send me a pull request. Since we want this list to be useful in the long run, please submit high quality links only.
Adding to this list
Please ensure your pull request adheres to the following guidelines:
- Please make an individual pull request for each suggestion.
- Please only submit resources that are completly free to access.
- The pull request and commit should have a useful title.
- Please search previous suggestions before making a new one, as yours may be a duplicate.
- Make sure your link has a useful and relevant title.
- Please use title-casing (AP style).
- Please use the following format:
- Link additions should be added to the bottom of the relevant category.
- New categories or improvements to the existing categorization are welcome.
- Please check your spelling and grammar.
Thank you for your suggestions!