I recommend godaddy.com or namecheap.com for domain name registration only - NOT for hosting.
Accepting Online Payments
recommend 1shoppingcart if you are already generating a good amount of sales and will
use your own merchant account. This
is one of the most powerful shopping carts I’ve worked with.
You can set up many products, do recurrent billing, set up membership
sites, provide upselling options, have your download page expire
automatically after a certain period of time, and provide your
own affiliate programs.
party providers allow you to take payments online without having
your own merchant account and without paying monthly fees. Popular
third party payment processors are PayPal, Clickbank and paydotcom®.
You can find more details and a comparison of third party providers here.
up with Autoresponders
are some of the best autoresponders available today:
For more information about autoresponders, I recommend reading these articles: