Unaffiliated with this group, but there are a bunch of graded readers, romanized with Jyutping, freely available, and very high quality![1]

If you’d prefer physical books, this online store imports quite a few from Hong Kong.[2]

A dictionary program for Windows/Mac/Linux that I make [3], and another for mobile that I don’t make.[4]

Finally, a list of other good resources from Cantonese Alliance.[5]

[1] https://hambaanglaang.hk/

[2] https://kozzi.ca/

[3] https://jyutdictionary.com/

[4] https://www.pleco.com/

[5] https://cantonese-alliance.github.io/language.html