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