Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Okular - Okular is a universal document viewer based developed by KDE.
TwistedBrush Pro Studio - A powerful and unique natural media painting program.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Corel Painter - Corel Painter is media painting software.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.