Merge pull request #89 from streaksu/patch-1

Update README.md

README.md

@@ -296,6 +296,7 @@ A curated list of awesome resources related to the Ada and SPARK programming lan
 - [cxos](https://github.com/ajxs/cxos) - Ada Operating System development example.
 - [havk](https://github.com/RavSS/HAVK) - x86-64 security-focused OS being created with SPARK.
 - [cubit](https://github.com/docandrew/CuBit) - CuBitOS is a multi-processor, 64-bit, (partially) formally-verified, general-purpose operating system, currently for the x86-64 architecture.
+- [ironclad](https://github.com/streaksu/Ironclad) - A kernel for x86_64 devices striving for POSIX compatibility, used on several distributions like [Gloire](https://github.com/streaksu/Gloire).
 
 ## Games
 - [steamsky](https://thindil.github.io/steamsky) - Roguelike in sky with a steampunk setting.