This GitHub repo turns Windows' built-in security controls into one open-source toolkit.
It's called Harden Windows Security.
Instead of installing another security engine, it uses supported Microsoft features already inside Windows. :contentReference[oaicite:0]{index=0}
→ Microsoft security baselines
→ Defender and attack surface reduction
→ BitLocker and Device Guard
→ Windows Firewall and exploit mitigations
→ App Control policy management
→ Security verification and scoring
The Harden System Security app has zero third-party libraries and zero telemetry. It supports x64 and ARM64, and installs from the Microsoft Store.
The repo is MIT licensed, has about 4.6K GitHub stars, and uses signed builds, SBOMs, and artifact attestations.
It's actively maintained too. Harden System Security v1.0.77.0 shipped on August 4, 2026.
This GitHub repo turns Windows' built-in security controls into one open-source toolkit.
It's called Harden Windows Security.
Instead of installing another security engine, it uses supported Microsoft features already inside Windows. :contentReference[oaicite:0]{index=0}
→ Microsoft security baselines
→ Defender and attack surface reduction
→ BitLocker and Device Guard
→ Windows Firewall and exploit mitigations
→ App Control policy management
→ Security verification and scoring
The Harden System Security app has zero third-party libraries and zero telemetry. It supports x64 and ARM64, and installs from the Microsoft Store.
The repo is MIT licensed, has about 4.6K GitHub stars, and uses signed builds, SBOMs, and artifact attestations.
It's actively maintained too. Harden System Security v1.0.77.0 shipped on August 4, 2026.
9. Grok Build
xAI's open coding agent CLI. You can read, compile, and study the exact agent loop behind Grok's coding stack. A free reference architecture for anyone building agents (read-only, no PRs).
https://t.co/6EJ7IPwlhz
Everyone keeps starring the same old GitHub repos. These 9 shipped in 2026 and most people haven't touched them yet.
No paywalls. No SDK wrappers with a pretty README. Just tools people actually keep open all day.
Here's the list:
8. Hallmark
A design skill for Claude Code, Cursor, and Codex that fights generic AI-generated UI. It runs slop-test gates before handing back a design, so interfaces feel intentional instead of templated.
https://t.co/a7sOeXOB0X
RIP ChatGPT for everything.
If ChatGPT is still your entire AI stack, you’re leaving a lot on the table.
Because the smartest AI users aren’t looking for one tool that does everything.
They’re using the ''best tool for each job.''