>>>All development completed by me and it uses SQL-SERVER, not .DBF fortunately...
>
>Soon you will enjoy working with lots of other people needed to make headway in the wonderful modern development scenario. The concept that one clever person should be able to complete an app and deploy it widely, is thoroughly old-fashioned.

I know, at the same time I'm an Axapta developer. I'm just a part of AX development team... ;)

But, I think Appstore, Google Play and in the future Windows Store is a big oppurtunity for individual developers. It's not old fashioned.