Isle of Wight Bus & Rail Users' Group

Southern Vectis:

http://www.islandbuses.info

Island Line Trains:
https://www.southwesternrailway.com/destinations-and-offers/island-line
 

Bus Users UK

http://www.bususers.org

Railfuture

https://www.railfuture.org.uk/Welcome-to-Railfuture