Most freeware image editors can do similar tricks; either sell this for a few dollars or convert it to Freeware.

Whiterabbit-uk, you make many comments in a short time but you forgot to read, think and try.
Resizing is very common, yes, but not this kind of resizing. It is not unique but it is not that common either. You seem to mix this up or not recognise it.
There is good freeware however. This will make it harder to compete while asking a price.