RLSD is described as 'small, "live" Linux-libre distribution with retro applications for the i686 and x86_64 architectures. It revives old hardware and the way computing used to be in the late 90s' and is an app in the OS & Utilities category. There are more than 10 alternatives to RLSD for Linux, Self-Hosted solutions, Mac, Windows and Haiku. The best alternative is Arch Linux, which is both free and Open Source. Other great apps like RLSD are Xubuntu (Free, Open Source), Lubuntu (Free, Open Source), Ubuntu MATE (Free, Open Source) and Puppy Linux (Free, Open Source).
Arch Linux is an independently developed, i686- and x86_64-optimised GNU/Linux distribution targeted at competent Linux users. It uses pacman, its home-grown package manager, to provide updates to the latest software applications with full dependency tracking.
Ubuntu Mate is a stable, easy-to-use operating system with a configurable desktop environment. Ideal for those who want the most out of their desktops, laptops and netbooks and prefer a traditional desktop metaphor.
The leading platform for scale-out computing, Ubuntu Server helps you make the most of your infrastructure. Whether you want to deploy an OpenStack cloud, a Hadoop cluster or a 50,000-node render farm, Ubuntu Server delivers the best value scale-out performance available.
SliTaz is a free operating system, working completely in RAM and booting from removable media such as a CD-ROM or USB key. SliTaz is distributed as a LiveCD, and weighs less than 40MB. The system is quick and responsive, clean and robust.