GIMP
From Notes_Wiki
GIMP
GIMP or (GNU Image Manipulation Program) is a very powerful image editor which supports layers. GIMP may require considerable learning for a beginner but some features such as 'Script-fu' which can be used for writing text with good patterns such as 'Fire', 'Water', 'Ice' etc. is very easy and intuitive to use. Users who have used advanced image manipulation tools similar to commercially available photoshop should find Gimp to be very useful open source and free alternative for image manipulation.