Is there a command line tool for smush.it?

Trimage is a tool similar to Smush.it:

Trimage image compressor losslessly optimizes your PNG and JPG files with very little fuss.

Available with both GUI and command-line interfaces, the application optimizes images via optipng, advpng and jpegoptim, depending on the filetype. The interface was inspired by OS X application ‘imageoptim’.

Source: OMGUbuntu.co.uk: Trimage Image Compressor – Simple & straightforward lossless compression