I'm running a more-or-less public
Teamspeak 3 server:
Address: ts3.order-of-phalanx.net
Port: 9877 (default)
No password
Feel free to use it for your Half-Life/Counter-Strike games!
Just be nice to everyone else, especially to the guys with the [SA] tags!

Also there is still a
Teamspeak 2 server running:
Address: ts2.order-of-phalanx.net
Port: 8767 (default)
No password
If you need the software, you can
download it here!