Good program performance and less RAM consumption, the best for low-resource computers. Adapt to any need, web server, personal computer, on my phone. Open Source and free. Kernel tested and tested before launch. Create 100% free system thanks to Portage. Compile any type of file with the default installation.

Gentoo is totally free maintained by the community without any company behind where you can have a completely free and secure Open Source system. Just install the programs necessary for its function, where you can choose what to do next. With Gentoo I have a very secure and robust server, where I can modify and install what I want, receive updates first than other Linux distributions which gives me more security on my server. Gentoo demands very few PC resources, you can install on any PC with the basics and there decide what to install to work.

If you like to get your hands dirty and really understand how the components of your distro work together, build or modify anything from scratch, use modern versions of important software tools without a need for 3rd party repositories, and still have access to a vibrant community for support: I'd consider Gentoo a fit.