Top open source graphics apps, in no particular order. Replace your Windows apps with these!
1. Gimp (raster manip)
2. Inkscape (vectors)
3. Krita (painting)
4. Blender (3D)
5. Scribus (DTP)
6. Darktable (photo editing)
7. Natron (compositor)
8. Kdenlive (video editing)
9. FreeCAD 3D
10. Friction (AE-like anim)
11. Synfig (vector anim)
12. QCad/CAM 2D
13. Pencil2D (anim)
14. Pixelorama (pixel art)
15. Handbrake (video transcoder)
16. Cura (3D printing)