With regards to getting NVDA addon's I know of at least two web sites which I have provided below. What are the differences between these two sites and which one should I use? The second web site is where you are taken if you select get addons under the NVDA tools/manage addons in the NVDA UI.
Thanks
https://nvda-addons.org/
https://addons.nvda-project.org/index.en.html