
Before:
After:
How to in GIMP:
1. Use color picker tool and airbrush (fuzzy circle, size 8.00) to smooth out the ruddiness in the cheeks.
2. Use color picker and smudge tool (fuzzy circle, size 5.00) to lessen the bruise under the left eye.
3. Use Vintage-look plug in (Cyan 10, Magenta 25, Yellow 42).
4. Select Background layer. Colors -> Levels. Use auto level.
5. Still in Background layer. Brightness -10, Contrast +20.
6. Merge layers.
7. Create vignette. Select large oval. Feather 500. Invert selection. Midtone levels to 0.35.