Zeal-Operating-System/ZealOS

Health v2 · maintenance only

Adoption not part of the score

2376 stars · 117 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

ZealOS is a modernized fork of the 64-bit TempleOS, a public-domain hobbyist operating system written in HolyC (renamed ZealC). It aims to be simple, fully documented, and comprehensible by a single person, with active work on VBE graphics, AHCI, networking, and UEFI booting.

Use cases

• run a simple open-source operating system in a VM
• study how an entire OS works from boot to shell
• experiment with a C-like language (HolyC/ZealC) at the OS level
• fork or contribute to a public-domain operating system
• explore TempleOS's design with modern improvements like 60 FPS and variable resolutions
• boot a minimal OS on bare metal or via UEFI with Limine

When to choose

• you want a small, fully readable, public-domain OS for learning or tinkering
• you are interested in TempleOS's philosophy but want modernized code, docs, and graphics
• you want to hack on kernel, drivers, or a JIT-compiled shell language in a self-contained system

When to avoid

• you need a production OS with security, multitasking hardening, or broad hardware support
• you need networking or modern drivers as stable, complete features (still in development)
• you want a general-purpose desktop or server operating system

Facets

application · maturity active

interpreter compiler graphics operating-systems developer-tools education windows cross-platform templeos holyc zealc public-domain bare-metal x86-64 retro-computing virtualization operating-system linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="Zeal-Operating-System/ZealOS")