seL4

seL4 is a highly secure and reliable computer operating system kernel designed to control how software interacts with hardware. It enforces strict security boundaries, ensuring that different parts of the system operate independently and can't interfere with each other, which reduces vulnerabilities. Used in critical applications like defense, aerospace, and industrial control, seL4 provides formal guarantees about its correctness, meaning its behavior has been mathematically proven to meet strict specifications. This makes it an ideal foundation for systems where safety and security are paramount, offering both performance and strong assurance against malicious or accidental errors.