Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems
Scorum.com - Become a paid sports blogger
MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
Fanly - Keep up with all of your favorite sports teams
Sipnetic - Sipnetic is a free VoIP softphone based on the SIP protocol.
Grandstand - Sports highlights straight from the crowd