- Canmore – National Monument Record online
- Pastmap – National Monument Record available on searchable map online
- National Library of Scotland – Map Images available in Digital Resources online
- Rousay Remembered – local heritage and archaeology website
- Archaeology Orkney – Skaill farmstead
- Tombs of the Isles – Rousay
- Tombs of the Isles – Egilsay
- Swandro – Orkney Coastal Archaeology Trust – website with reports and information
- Orkneyjar – Orkney heritage and folklore
- The Megalithic Portal – website for prehistoric monuments worldwide
- Undiscovered Scotland – online guide to Scotland