Contributing

Steps

Submit a pull request to add, remove or edit the list.
List items should be sorted alphabetically.
Remove any articles such as A, An and The from the link name.
Descriptions should be clear, concise, and non-promotional.
Add a full-stop at the end of the description.
At least 3 items are needed to create a new category.
Re-generate TOC (Table of Contents) with doctoc
```
doctoc README.md --github
```