Castletown Golf Links Hotel
- A hotel with an 18 hole championship golf course. It is situated on a peninsula with water at all sides. Includes prices, booking information, and photos.
- http://www.castletowngolflinks.co.uk/

PDMS eBusiness
- Object technology, XML publishing and web development for e-commerce and publishing solutions.
- http://www.pdms.com/

Advanced Systems Consultants
- Local ISP with emphasis on business clients.
- http://www.advsys.co.uk/

Arts Interactive
- New media company based in Castletown.
- http://www.arts-interactive.co.uk/

Pooil Vaaish Quarry
- Manufacture a wide range of stone products from black limestone and also import granite worktops, and fireplaces. Contains news, list of products, and contact details.
- http://www.pooilvaaish.com

Castletown Holiday Cottages
- Carrick Cottages and Mill Street Cottages in Castletown
- http://www.cottages-isle-of-man.co.uk/

Anchor House
- Located in Castletown. Includes contact information and photos.
- http://eddie.craine.com/isle_of_man.htm

Castletown - Ancient Capital of Mann
- Includes information, history, photos, notices and reports about events and activities in the town.
- http://www.castletown.org.im/