Network Data Monitor

• http://securityonion.blogspot.com/

Gibson 3D

See realtime network data in a 3D form.

• Debian
• Panda3D

Notes

• For Linux, I'd go with something that's less likely to include new features. E.g., CentOS instead of Fedora. Last time I tried it, Panda was still using an older video API that was no longer supported by my distro (Fedora, I think.)