Paintshop Pro is both a picture processing program and a paint program.
To replace it you need two freeware programs, Photofiltre and Pixia.
(But if you use only the picture processing features in PsP you can, of
course, replace it with only Photofiltre.)
Pixia is by far the best lightweight paint program.
It has an interface which needs a little learning, but that is easy to
accomplish with the help of the tutorials which are available on the web.
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