Are there other LSM (Linux Security Modules) in addition to SELinux and AppArmor?

In researching this U&L Q&A titled: permission denied for ptrace under GDB , the question came up, "Is there other software similar to SELinux & AppArmor?". User @IwillnotexistIdonotexist mentioned 2 that I'd never heard of: Smack & Yama. He found them by searching through the Linux source code. So now we're up to 4. - SELinux - AppArmor - Smack - Yama Are there others?