In Project Explorer - A Tab for Sharepoint or other URLs

There needs to be an easy quick location (A tab [like FIles | Revisions | Change Orders| ...] seems to make the most sense) to add project specific related URLs. These could be anything from Sharepoint, ProCore, FieldWire, OneDrive, Google Drive, Dropbox, or sites that publish updated RFP Info, project specific information, or drawings.