I thought it would be helpful to create a resource page that you can always come to for all of your needs. I will add to it as I learn more, it is still on the way update.
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Email Subscriptions and Marketing
Aweber: The internet’s most powerful email opt-in service and email marketing or broadcasting tool.
BacklinkBeast: This is new software just launch this year and it works really good, easy to use and great support, but the cost is a bit high, they bill monthly or you can choose one time payment is best, for my recommendation, you should try on their trial 7 days then decide yourself, get it here “backlinkbeast” and see how does it work.