PureDarwin is described as 'Darwin is the Open Source operating system from Apple that forms the basis for Mac OS X, and PureDarwin is a community project to make Darwin more usable (some people think of it as the informal successor to OpenDarwin' and is an app in the OS & Utilities category. There are more than 100 alternatives to PureDarwin for a variety of platforms, including Linux, Self-Hosted solutions, BSD, Windows and Mac. The best alternative is Debian, which is both free and Open Source. Other great apps like PureDarwin are Linux Mint (Free, Open Source), Manjaro Linux (Free, Open Source), Arch Linux (Free, Open Source) and Windows 10 (Paid).
Peppermint was designed for enhanced mobility, efficiency and ease of use. While other operating systems are taking 10 minutes to load, you are already connected, communicating and getting things done.
CloudReady is a operating system built and maintained by Neverware. Based on Google’s open source Chromium OS, CloudReady uses web apps and both cloud storage (Google Drive) as well as local storage (File manager). Comes without Android app support.
Chromium OS is an open-source project, used primarily by developers, that aims to build an operating system that provides a fast, simple, and more secure computing experience for people who spend most of their time on the web. Chromium OS and...
BunsenLabs Linux is a distribution offering a light-weight and easily customizable Openbox desktop. The current release is Helium, built on top of Debian (stable). The project is a community continuation of CrunchBang Linux.