For our enterprise customers with Spaces you can now add custom links that will display above the products and apps within each space.  This will allow System Administrators or Space Administrators to add links at the top of each Space to external resources commonly used by your end users (i.e other local institutional systems or sites).  

Within Spaces you'll now see the Apps & Links tab where it will display all apps and links within each space:

Within the Apps & Links you'll now see the Links section:

To add external Links to your Space you can click the +Add Link button to add the Title that will display, url, description (optional), and upload an image for the link:

After saved you'll see the link information at the top of each Space: