I've been naughty again...
Editing is one of my hobby so..STFU!
They software I'm using is Photoscape.
It's well known and quite popular nowadays.
I bet you have it too. heee..
If you don't, get it.
It's a free software. ^_^
I played around with the Watercolor pencil.
1. Open Photoscape (obviously)
2. Open an Image (again..obviously)
3. Click Filter button and
4. then the Pictorialization.
note: If you don't see the Watercolor Pencil in the Pictorialization,
download the latest version of photoscape
mine doesn't clearly show the effects cuz I put it on a low level.