Hi lylejk.
Among the programs that you recommend, there are some I didn't know at all until now, so thanks for the information.
![Smile :)](./images/smilies/icon_smile.gif)
Regarding PicPaks, I have just taken a look at the sample images posted in the developer's homepage and I have been impressed by the beauty of the effect produced, but it is still not entirely clear to me whether the program is totally free or not, as "Store" and "Purchase" buttons appear there (sorry, I am writing from my phone at the moment, so I have some difficulty in properly viewing the visited sites).