SIP providers are plenty: Sip2Sip, OnSIP, AntiSIP, pbxes, Ekiga, IPtel, Linphone itself, not to mention various SIP-to-PSTN providers like ippi and various Dellmont clones. For pure SIP, I used AntiSIP most.

Reply to this note

Please Login to reply.

Discussion

Oh, I also forgot opensips.org, also nice and no-nonsense. I guess antisip and opensips are my top.