General

https://www.facebook.com/thecapdetective/ –  A Facebook page dedicated to the identification of awarded players caps

http://internationalcaps.webs.com/ –  A great source of information on individual caps sorted by sport and types

Hockey

http://www.hockeymuseum.net/ – The Hockey Museum is a relatively new organisation whose aim is to preserve, share and celebrate the rich heritage and history of the sport of hockey.

Regional Links

http://www.nma.gov.au/ The National Museum of Australia

Rugby

http://rugby-memorabilia.co.uk/  Home of the Rugby Memorabilia Society. The world wide home for rugby union memorabilia collectors.

http://www.englandrugby.com/twickenham/world-rugby-museum/ – World Rugby Museum based on Twickenham. A good selection of caps going back as far as 1871.

http://www.principalitystadium.wales/tours/index.php – For details of tours of the Principality Stadium.

https://www.rugbyschool.co.uk/commercial/school-shop-and-tours/tours/ – For tours of Rugby School and its museum including its sporting past.

http://www.wru.co.uk/eng/thewru/history/index.php –  A guide to the Welsh Rugby Union and links to all other things WRU.i