Zip-Ada is a free, open-source, independent programming library for dealing with the Zip compressed archive file format. It includes LZMA & BZip2 independent compressor & decompressor pairs (can be used outside of the Zip archive context).
Home page: https://unzip-ada.sourceforge.io/
Sources, site #1: https://sourceforge.net/projects/unzip-ada/
Sources, site #2: https://github.com/zertovitch/zip-ada
Alire Crate: https://alire.ada.dev/crates/zipada
What’s new in this version:
- Added compression for the BZip2 format for .bz2 and .zip files or streams.
Note that Zip-Ada .zip archive creation with the “Preselection_2” mode now tops (or rather, bottoms 
in terms of compressed size) 7-Zip for both Calgary (*) and Canterbury compression benchmarks, that for the .zip format and even the .7z format.
Enjoy!
(*) File names need extensions: .txt, .c, .lsp, .pas