BetterJPEG is a JPEG editor specifically designed to avoid recompression loss when editing and resaving photos. BetterJPEG does not recompress parts that didn't change.
Features: lossless rotation, flip, lossless crop (free, fixed aspect, fixed size, predefined aspects,...), lossless date/EXIF info/text insertion (position, font, size, color, background, language, format, etc.), lossless red eye removal (anti-aliasing, darkening,...), and more..