spooky_luke: Thanks to all who attended. Time for this listing to go.
Just a reminder of the website mentioned:
http://benchmarks.org.uk/magicmapit.php
Useful for seeing whether or not a potential cache location is subject to statutory regulations that will necessitate special permissions.
https://follow-the-arrow.gagb.co.uk/htmlcodes.html
Useful or utilising html code in your cache descriptions to add hyperlinks, coloured text and pictures.
https://kit.wherigofoundation.com/
Useful for creating straightforward Wherigo Cartridges without having to know how to write in Lua code.
https://project-gc.com/Tools/Challenges
Useful for cloning existing/creating new Challenge Checkers for Challenge Caches.