ImageMagick

Solarizing image

convert -solarize 40% input output

Modulating image

convert -modulate 40 input output

Blurring image

convert -blur 0x3 input output

Negating image

convert -negate input output

Charcoal image

convert -charcoal 1 input output

Grayscale image

convert -colorspace Gray input output

Add Border to image

convert -bordercolor blue -border 10 input output

Saturate image

convert -modulate 100,250 input output