1. For Marketing Your Practice Or Business
E-Junkie. A simple and cheap way to sell your digital downloads is E-Junkie. When I first started out they had a plan for $5 month...and they still have that plan. It is good enough to get started. Keep your expenses low when you are first starting out.
E=Junkie normally has a 30-day trial. But as of the moment, I am writing they are offering a 1-year trial due to the pandemic: https://www.e-junkie.com/wiki/e-junkie-1-year-free
SamCart SamCart has helped me increase my Feldenkrais download sales and increased the average size of my orders. They are fantastic. Even so, I do not recommend them unless you already have several products that you sell and also a large email list. Once you are an established marketer they can help you a great deal. Here is my affiliate link to their demo. And here is the page that has their latest prices.
It has been over 15-years since I started to use Aweber and I am still with them. Building your email list is the most important thing that you can do to increase your influence, independence and income: