Zlib-ng is aiming to be open to contributions, and we would be delighted to receive pull requests here on github.
Just remember that any code you submit must be your own and it must be zlib licensed.
Help with testing and reviewing of pull requests etc is also very much appreciated.

If you are interested in contributing to zlib-ng in some way, please consider joining our chat server.
(Email-based registration required. 2FA using Authy, Google Authenticator, etc is also available)
PS: This chat server is not intended for providing support regarding how to use the zlib/zlib-ng APIs.

If you are interested in contributing financially, sending hardware, or giving access to hardware, we are very grateful.
Running tests on real hardware is always better than using qemu, so we are currently looking to set up a few arm/aarch64 servers for Github CI use, we are also interested in improving testing of RiscV and other architectures.

We have set up Github Sponsors account to make financial contributions easy and safe.
If you want to contribute hardware or access to hardware, please contact us by email or chat.
PS: please note that power usage and noise is an issue, so contributions of big old power hungry servers might be less interesting.