Lubuntu is described as 'Fast and lightweight operating system with a clean and easy-to-use user interface. It is a Linux system, that uses the minimal desktop LXDE/LXQT' and is a very popular Linux Distro in the os & utilities category. There are more than 100 alternatives to Lubuntu for a variety of platforms, including Linux, Self-Hosted, Windows, Mac and Raspberry Pi apps. The best Lubuntu alternative is Linux Mint, which is both free and Open Source. Other great apps like Lubuntu are Ubuntu, Fedora, Zorin OS and Manjaro Linux.
Bringing the best of Ubuntu and Unity together, Ubuntu Unity is a beautiful, slick and lightweight Ubuntu flavour. With its beautiful design, efficient and elegant workflow, and features like the heads-up display (HUD), the Global Menu, powerful search and a high level of...
Serenity is a graphical 32-bit Unix-like operating system with 90s aesthetics and built for x86 systems.
The ubermix is an all-free, specially built, Linux-based operating system designed from the ground up with the needs of education in mind.
Mabox Linux is based on Manjaro, featuring a customized Openbox window manager preconfigured to be ready to use.
MiniOS is a lightweight and fast Linux distribution designed for installation on a USB drive. The MiniOS project was launched in 2009 as a Linux distribution for USB drives based on Mandriva Linux. However, in 2013 it was suspended due to the liquidation of Mandriva.
GLF OS is a gaming-oriented live Linux distribution based on NixOS. Developed by a French-speaking community called Gaming Linux France (GLF), the distribution includes everything one would need for gaming on Linux, including Steam, Lutris, Heroic Games Launcher, as well as...
Linspire is a 64 bit Linux based OS, that is geared towards the business, education and government worker. It has all the applications business users will need for work, research and deployment among very high end desktop systems.
dahliaOS is a modern, secure, lightweight and responsive operating system, combining the best of GNU/Linux and Fuchsia OS.
The Freespire Operating System is the open source and free as in beer release of the commercial Linspire operating system.
instantOS is a Manjaro based distro that works out of the box but is still aimed at power users. Everything is lightning fast and works out of the box.
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This is the lightest Linux I could find. Worked fast even on decade old notebook with 1 giga ram. Apps options are limited though.