I'm figuring the ways to sell software online. I want a service that is easy to use. PayPal is good, but I'm not sure if most of the people have PayPal. Also Fortumo is a good service, it works in most of the countries, by sending payed SMS. Are there other ways? And what's the most common way?
If PayPal is the best, can someone please provide me a service that uses PayPal to send serial keys from a database. Or something similar.
From reading your question and the comment you made on another answer it seems like you're looking for either a completely licensing + payment solutions or you're looking for a payment solution that works with your own home-made licensing. I'll cover both options.
Licensing + Payment processor
I'm founder of the company that makes LimeLM -- a licensing solution for Windows, Mac, and Linux. We actually have pre-made scripts that you can upload to your website that gives your user multiple options for payment. See: How to generate product keys after an order. We show how you can use one (or all) of the following payment providers:
Here's what it would look like on your site:
Home-made licensing + Payment processor
The second option is to build it yourself.
There are several payment providers like:
I found FastSpring very transparent, easy to use and they provided good customer support so far.
Steven here from FastSpring.
I just wanted to reach out and let you know that we accept multiple payment options including PayPal and all major credit cards, and we support a wide range of currencies.
However, if you're looking for something out-of-the-box, Wyatt provides a great solution above, and we do also have built in integration with Software Passport, Soraco's QLM, ByteShield, Aquatic Prime, and CocoaFOB.
Feel free to contact me for further questions/details.
Not sure what exactly you are asking, but I wrote a simple php script to email license keys after a paypal payment was made. There are quite a number of resources online that will provide the code to show how it is done.
PayPal has an API for this.
If you are not a developer I am sure you could pay someone to do it for you - probably for less than $1000 and likely even cheaper than that