My 5 favorite open source operating systems that aren't Linux

📰 ZDNet

Explore 5 open-source operating systems beyond Linux for unique features and functionalities

intermediate Published 28 Apr 2026

Action Steps

Research Haiku OS as a BeOS-inspired alternative
Explore ReactOS as a Windows-compatible open-source option
Investigate FreeRTOS for embedded systems and microcontrollers
Discover OpenIndiana as an open-source Solaris derivative
Try out Redox OS as a Rust-based operating system

Who Needs to Know This

Developers and system administrators looking for alternative operating systems can benefit from this knowledge to broaden their skill set and explore new possibilities

Key Insight

💡 There are viable open-source alternatives to Linux, each with their own strengths and use cases