This is the essence of brightness and color correction in digital photos, when you want to modify only part of the photo instead of the whole one.
How to cut out something complicated.
Adding a simple and free color eraser to Photoshop
Crop a complex shape from its background using a new masking plugin
A new starlet among sharpening plugins
Baby face or axe face? A cartoon photoshop plugin at work.
It filters noise and costs nothing
Creating unique artistic effects with a fractal-based plugin
A soft but sharp effect using a free soft focus plugin.
A digital painter for Photoshop paintings.