Top Alternatives to ReactOS

Windows 7 is a widely adopted operating system from Microsoft, known for its refined user interface, stable performance, and enhanced security features compared to its predecessors. It aimed to provide a more intuitive and efficient computing experience for both everyday users and professionals.

Linux Mint is a free and open-source operating system based on Ubuntu and Debian. It is known for its user-friendly interface, stability, and comprehensive software library, making it a popular choice for both new and experienced Linux users seeking a reliable desktop environment.

Arch Linux is a lightweight and flexible Linux distribution that follows a rolling-release model. It's designed for users who prefer a "do-it-yourself" approach and desire complete control over their system.

Fedora is a leading-edge, free, and open-source operating system built on the Linux kernel. As the upstream source for Red Hat Enterprise Linux, it provides a platform for technological innovation, offering the latest software packages and a strong focus on open-source principles. It's known for its rapid release cycle and dedication to incorporating new technologies early.

openSUSE is a community-developed, open-source Linux distribution sponsored by SUSE. Known for its powerful configuration tool, YaST, and commitment to usability, openSUSE offers both a stable release (Leap) and a rolling release (Tumbleweed) to cater to diverse user needs, from developers to desktop users.

Xubuntu is an official derivative of the Ubuntu operating system, utilizing the lightweight and user-friendly XFCE desktop environment. Focused on providing a stable and efficient computing experience, it's an excellent choice for users seeking a balance between modern features and low system resource usage, making it suitable for older hardware and everyday tasks.

FreeBSD is a powerful, stable, and feature-rich operating system rooted in the BSD tradition. It excels in server environments, embedded systems, and as a robust desktop platform, prioritizing performance, security, and network capabilities.

Lubuntu is an open-source operating system based on Ubuntu, designed for speed and energy efficiency. It utilizes the LXQt desktop environment to provide a simple and lightweight user experience, ideal for older hardware.

Kubuntu is an official variant of the Ubuntu operating system that replaces the GNOME desktop environment with the elegant and highly customizable KDE Plasma Desktop. It provides a familiar yet powerful computing experience, blending Ubuntu's stability with the visual appeal and extensive features of the KDE ecosystem.

Gentoo Linux is a flexible and highly customizable Linux distribution known for its source-based package management system, Portage. Designed for experienced users who desire granular control over their software installations and system optimization, Gentoo offers unparalleled flexibility in configuring a system precisely to individual needs.

CentOS is an open-source operating system derived from the source code of Red Hat Enterprise Linux (RHEL). It provides a stable, enterprise-class platform for servers and workstations, supported by a vibrant community.

Manjaro Linux is a user-friendly, Arch Linux-based distribution that offers the benefits of a rolling release model combined with ease of use. It provides a stable and customizable desktop experience suitable for both new and experienced Linux users.

Red Hat Enterprise Linux (RHEL) is a powerful, stable, and secure open-source operating system platform designed for demanding enterprise environments. Known for its robust performance and extensive support, RHEL is a leading choice for critical workloads.

Haiku is a free and open-source operating system inspired by the BeOS. It offers a lightweight, responsive, and stable environment for both developers and everyday users, focusing on consistency and simplicity.

Puppy Linux is a family of lightweight Linux distributions designed for speed, efficiency, and ease of use. It can boot from various media and run entirely in RAM, making it incredibly fast and suitable for older hardware or as a portable operating system.

TrueOS, formerly PC-BSD, is a desktop-focused Unix-like operating system built on the FreeBSD-CURRENT branch, offering a rolling release model and a user-friendly interface. It aims to provide the stability of FreeBSD with out-of-the-box usability for everyday computing.

OpenBSD is a security-focused, free and open-source Unix-like operating system derived from the Berkeley Software Distribution (BSD). It is renowned for its extensive code auditing and commitment to correctness and proactive security.

Ubuntu MATE is a community-driven, official derivative of Ubuntu, providing a classic, intuitive desktop environment based on MATE. It offers stability, flexibility, and a familiar user interface, making it an excellent choice for users transitioning from other operating systems or seeking a traditional desktop experience.

Slackware is a veteran Linux distribution renowned for its simplicity and stability, adhering closely to the Unix philosophy. It's designed for users who prefer a hands-on approach and deep understanding of their system.

SliTaz GNU/Linux is an extraordinarily compact and fast GNU/Linux distribution, ideal for low-resource machines, older computers, and embedded systems. It's known for its tiny footprint, rapid boot times, and ability to run entirely from RAM, making it a superb Live CD/USB option.

Zorin OS is a Ubuntu-based Linux distribution designed to be accessible and user-friendly for newcomers and existing Linux users alike. It offers a familiar desktop layout similar to Windows and macOS, making the transition from proprietary operating systems smoother. With a focus on security, speed, and a vast software library, Zorin OS provides a robust and flexible alternative for personal computing.

Edubuntu is a free and open-source operating system derivative of Ubuntu, specifically tailored for educational environments. It provides a robust and stable platform with a wide array of pre-installed educational software, making it an ideal solution for schools, classrooms, and homeschooling.

Deepin is an open-source operating system based on Debian, renowned for its elegant and user-friendly interface. It aims to provide a beautiful, intuitive, and reliable desktop experience for users of all skill levels.

Solus is an independently developed Linux operating system built from scratch, designed for modern home computing. It offers a curated desktop experience with a focus on usability, performance, and reliability. Solus aims to provide a seamless out-of-the-box experience for users of all skill levels.

ArchBang is a lightweight, rolling-release Linux distribution built on Arch Linux, featuring the Openbox window manager. It's designed for users who appreciate speed, minimalism, and a high degree of customization right out of the box.

KDE neon is a cutting-edge software distribution that pairs the latest KDE Plasma desktop and applications with a stable Ubuntu Linux base. It provides users with a vibrant, modern, and highly customizable computing experience, focusing on bringing the newest contributions from the KDE community directly to the user.

NixOS is a Linux distribution built around the powerful and declarative Nix package manager. It emphasizes reliability and reproducibility through a purely functional configuration model, ensuring consistent behavior across different systems.