Caesium Image Compressor Alternatives for Linux

AdvanceCOMP is a collection of recompression utilities for your .ZIP archives, .PNG snapshots, .MNG video clips and .GZ files.

Leanify is a lightweight lossless file minifier/optimizer. It removes unnecessary data (debug information, comments, metadata, etc.) and recompress the file to reduce file size. It will not reduce image quality at all.

Optimizt is a CLI tool that helps you prepare images during frontend development.

With BIMP you can apply a set of manipulations to an entire group of images! It provides an easy to use interface and a lot of batch functions.

NConvert is a powerful command line multi-platform batch image processor with more than 80 commands. Compatible with 500 image formats.

Crunch - Insane(ly slow but wicked good) PNG image optimization. It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE compression algorithm encoding using embedded versions of the pngquant and zopflipng PNG optimization tools.

A program to simple reduce and rotate images. This GTK application can be useful for processing digital photos before sending by e-mail or uploading on the web.

jPDFOptimizer is a Java PDF library SDK used to optimize and reduce the size of PDF documents.