.gz

Zlib, C library for reading/writing .gz files. The following are all based on this great library.

Gzstream, a wrapper for zlib which defines C++ streams for zlib which work just like ifstream, etc.

However, I need to read .zip archives which are more complex than .gz files because they can contain several files and directory structure. To this end, there is:

Minizip, an addon for zlib to handle .zip files. It is also distributed with Zlib1.2.3.

A C++ wrapper class for Minizip, written by David Godson