Graphic soft GIMP can creates variety logos, images and processes photos into oil painter, water paint etc.
GIMP1.2, you should copy downloaded script-fu to GIMP folder(if you installed C:/Program Files/GIMP, you copy "share/gimp/1.2/scripts folder").
Later GIMP2.0, you can set script-fu folder at GIMP's preference.
Number(for example 1.2 from Ver1.2) is GIMP Version.