The text in README.md is written im Markdown, which uses plain text to produce a nice looking format. The most direct way to contribute is to make a Pull Request to this repository. To do this,
- Open the README.md file in a new tab.
- In this tab, click on the pen on the top right of the file content ("edit this file")
- Edit whatever you want to edit. In the best case, your addition should include name of the model/dataset/tool, one sentence description, and potentially URL and/or related publication.
- Check out what you have changed using the "Preview" tab
- Go to the bottom of the page and give your edits a meaningful description in the field below "Commit Changes", e.g. "added OGGM as a glacier model"
- Switch the radio button to "Create a new branch for this commit and start a pull request". You may edit the name of the branch, e.g. "add-oggm"
- Click on "Propose Changes" at the bottom
- Click on "Create Pull Request"
Your request will be managed then.
However, you can also always send your addition via E-Mail. Please make sure to include as much information as possible listed under "2.".