Poetic Cantonese podcast (available on Spotify, apple podcast, google podcast and more)
Comprehensive forum on Cantonese and dictionary.
http://www.cantonese.sheik.co.uk/
Learning traditional Chinese characters (geared towards kids but adults could benefit as well)
http://hhsscicanwriteicanread.weebly.com/
To find Cantonese pronunciation from a charater:
https://humanum.arts.cuhk.edu.hk/Lexis/lexi-can/
If you need help inputing Chinese characters:
http://www.cantoneseinput.com/
Chinese characters to jyutping:
http://humanum.arts.cuhk.edu.hk/Lexis/lexi-can/
Cantonese Meetup Group (London)
https://www.meetup.com/cantonese-5/
Where I also teach:
Chinese Independent School of Tower Hamlets:
http://www.cis-london.co.uk/Contact-Us.html