Suggestions on SIP Softphone

Hello,

I am configuring SIP trunks in Asterisk and I want a SIP softphone to test the same. Can someone suggest a good SIP Softphone for Linux?. I have installed Asterisk on CentOS 5.

Thanks

Try with Zoiper

Ekiga. Most standart-compatible.

Or Blink, or SIP Communicator (now Jitsi)