Turbo Recompress

Turbo Recompress is a very small wrapper tool around the excellent jpeg-recompress that can resize your images to a minimum size, while not visually changing the quality.

jpeg-recompress works especially well with DSLR images.
Here is a demo of the colosseum: Original (Nikon D5300) (4.56 MB) and Recompressed (1.28 MB)

Turbo Recompress will:

Download (x64) : Here