Insane(ly slow but wicked good) PNG image optimization
Crunch is an image compression tool for lossy PNG image file optimization. Using a combination of selective bit depth, color palette reduction and color type, as well as zopfli DEFLATE compression algorithm encoding that employs the pngquant and zopflipng PNG optimization tools, Crunch is effectively able to optimize and compress images with minimal decrease in image quality. While it may produce file size gains larger than those produced by lossless approaches, the impact on image quality...
LZHW Windows command line lossless compression tool for tabular files
LZHW Command Line Lossless Compression Tool
is a Windows command line tool used to compress and decompress files from and to any form, csv, excel etc without any dependencies or installations.
Using an optimized algorithm (LZHW) developed from Lempel-Ziv, Huffman and LZ-Welch algorithms.
The tool can work in parallel and most of its code is written in Cython, so it is pretty fast.