Contribution guidelines

To add to the list: submit a pull request
To remove from the list: open an issue

I want to add a new entry to the list

Contribute links to the packages/projects you are familiar with
Search existed entry/suggestion before making a new one
Run specs (crystal spec) before opening a pull request

List quality rules

List items should be sorted alphabetically
Each item should be limited to one link
Description should be clear and concise. Excessive information like "... for Crystal programming language" should be omitted

New package requirements

Package/project is a good candidate to add to the list if it is:

Generally useful to the community
Functional
Actively maintained
Stable
Documented
Has tests (when possible)

I want to open an issue

Please open an issue if you find anything that could be enhanced or have any suggestions for making the list more useful.