sip dialer

Simple color picker for developers.

A broadcast dialer with Interactive Voice Response (IVR) capability for business

SIP softphone with PBX-like features.

SIP and IAX/IAX2 software phone.

Provides IM/file transfer functionality based on SIP SIMPLE.

Easy-to-use SIP client.

Internet phone and instant messenger (was SIP Communicator).

symPhonie is a SIP softphone for MAC

Phone dialer plugin for Apple Address Book.

Dial your iPhone from your Mac.