Within Teamwork, you can store, categorize, and tag links on a project.
To create a new link, go to the Links area of your project and click the Add a Link button in the top right.

In the Add a New Link modal, you can add the link along with a title and description.

Link options
Title: Create a name for the link. This will be displayed in the links area.
Link/HTML code: Add in your relevant code. This can be a URL, Flash code, iFrame src etc.
Description: Add a description for the link. This will be shown under the title.
Privacy:
Select who should be able to see the link
Choose whether to send an email notification to people about the new link.
Advanced:
Category: Choose from an existing category or add a new one directly using the Add Category link at the bottom of the dropdown.
Window width/height: Adjusts the space an embedded resource will display
Tags: Add tags to your links. Select from existing or create new ones.
For more information, see: Setting Privacy on Links