Also WEP-M+2 (Here) Runs on Linux and Mac but counts as the Mac OS is a derivative of Linux/Unix.

And to stretch that definition even further T4T (Here) is Linux only. The VirtualBox Guest VM that does the actual work for the project is Linux though VirtualBox's Host client runs on many platforms.

Then there is OProject's sub-project Shor's Algorithm (Here) is Linux only.