Normally you won’t see me writing a lot about Mac, but after seeing user response looking for software for Mac, I decided I would make a list of what options Mac users have. Remember new Mac OS is basically BSD, so I think most Linux software should run with little to no modification.

Gizmo
Gizmo Project uses your internet connection (broadband or dial-up) to make calls to other computers. With the click of a mouse, you’re connected to friends, family, and colleagues anywhere on earth. It’s just that simple. You talk clearly. For as long as you want. For free.
And with inexpensive add-ons like CallIn and CallOut, you can talk to any telephone, mobile or landline, on the planet.

• License: Freeware
• Author/Publisher: SIPphone
• Requirements: Mac OS X 10.3.9 or higher

Download File Size: 18.6 MB
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LoudHush
LoudHush functions as an IAX client for the Asterisk PBX. With LoudHush you can initiate and answer, hold and transfer voice calls using your computer.

• License: Shareware
• Author/Publisher: LoudHush
• Requirements: Mac OS X 10.3 or higher

Download File Size: 1.6 MB
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ohphoneX
ohphoneX (pronounced as “oh-fone-ten”) is a H.323-compliant client application for video conferencing and IP telephony. It uses the protocol stack developed by the OpenH323 Project. ohphoneX is the first application from the XMeeting Project, the goal is to bring standard based video conferencing and IP telephony application to Mac OS X. ohphoneX is designed to be a simple application that does Mac-to-Mac and Mac-to-PC (i.e. NetMeeting) audio/video conferencing, as well as Mac-to-Phone voice only communication. Therefore, advanced features such as multi-party conferencing and answer machine is not included in this release. However, these features will be included in other applications from the XMeeting project.

• License: Freeware
• Author/Publisher: XMeeting Project
• Requirements: Mac OS X 10.2.4 or higher

Download File Size: 4.4 MB
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SJPhone
SJphone is a SIP/H.323-based softphone for Mac OS X, MS Windows, Windows CE, Linux and other VOIP applications. A number of advanced features make it possible to meet the needs of both personal users and service providers.

• License: Freeware
• Author/Publisher: SJ Labs
• Requirements: Mac OS X

Download File Size: 4.7 MB
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Skype
Skype is the next phenomenon from the people who brought you KaZaA. Just like KaZaA, Skype uses P2P (peer-to-peer) technology to connect you to other users - not to share files this time, but to talk and chat with your friends.
Our software’s quick and easy to install. Just download Skype, register and within minutes you can plug in your headset, speakers or USB phone and call your friends. The calls have excellent sound quality and are highly secure with end-to-end encryption. You don’t even need to reconfigure your firewall or router. It just, you know… works.
You can also use our SkypeOut function to make calls to friends who only have a landline or mobile phone anywhere in the world at local rates. You can even transfer files of up to 2 gigabytes. *Remember Skype uses proprietary technology compared to most other softphones listed.

• License: Freeware/Paid service
• Author/Publisher: Skype Technologies S.A.
• Requirements: Mac OS X 10.3.9 or higher

Download File Size: 30.8 MB version 2.6.0.184 for Mac OS X 10.3.9 to 10.4.11
Download File Size: 34.4 MB version 2.7.0.195b for Mac OS X 10.3.9 to 10.5.x - November 29, 2007
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TeamSpeex
TeamSpeak is a Voice over IP program used by alot of gamers to communicate with each other with voice. The TeamSpeak client is available for Windows and Linux users and an official Mac client has been announced more than 1 year ago but there is still no Mac client as of today..
So I was tired of waiting and seeing Mac users being left in the dark and not supported by not having a client, up until now ofcourse because (you probably already guessed it) TeamSpeex is a TeamSpeak client for Mac OS X!
I named it TeamSpeex because it only supports the Speex codec. It is fully compatible with existing TeamSpeak servers, and with PC and Linux users.
TeamSpeex is a third-party client for TeamSpeak, that means they have nothing to do with this product. So do not bug or contact the TeamSpeak developers if you have problems related with TeamSpeex.

• License: Freeware
• Author/Publisher: TeamSpeex
• Requirements: Mac OS X 10.4 or higher

Download File Size: 902 Kb
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Ventrilo
Ventrilo is comprised of two primary Components: The Client that every end user will need to download, and the Server. Only one person needs to host a Server that all of the other Clients will connect to. Ventrilo is supported on different platforms as well ranging from Microsoft Windows to Apple Manintosh and Linux.

• License: Freeware
• Author/Publisher: Flagship Industries
• Requirements: Mac OS X 10.3 or higher

Download File Size: 4.6 MB
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X-Lite
CounterPath’s X-Lite 3.0 is the market’s leading free SIP based softphone available for download. Based on the advanced architecture of eyeBeam 1.5 (CounterPath’s carrier grade telephony client), the new X-Lite is designed to showcase some of the feature rich capabilities available with our commercial softphone such as superior audio and video quality, zero-touch configuration, IM & Presence, and a comprehensive personal address book.

• License: Freeware
• Author/Publisher: CounterPath
• Requirements: Mac OS X 10.4 or higher

Download File Size: 14.6 MB
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XMeeting
With each release, XMeeting is becoming more and more stable, compatible and usable. Starting with the release of version 0.2, XMeeting has almost all features included with ohphoneX and already has many important new features that ohphoneX never had. And, XMeeting simply looks better! If you’re using Mac OS X 10.4 “Tiger”, we recommend you to start using XMeeting for video conferences. We’re still working hard on improving XMeeting and adding many important videoconferencing features.

• License: Freeware
• Author/Publisher: XMeeting Project
• Requirements: Mac OS X 10.4 or higher

Download File Size: 8.6 MB
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Zfone beta
I think it’s better than the other approaches to secure VoIP, because it achieves security without reliance on a PKI, key certification, trust models, certificate authorities, or key management complexity that bedevils the email encryption world. It also does not rely on SIP signaling for the key management, and in fact does not rely on any servers at all. It performs its key agreements and key management in a purely peer-to-peer manner over the RTP packet stream. It interoperates with any standard SIP phone, but naturally only encrypts the call if you are calling another Zfone client. This new protocol has been submitted to the IETF as a proposal for a public standard, to enable interoperability of SIP endpoints from different vendors.
Zfone has been tested with these VoIP clients and VoIP services:
VoIP clients: X-Lite, Gizmo, and SJphone.
VoIP service providers: Free World Dialup, iptel.org, and SIPphone.

• License: Freeware
• Author/Publisher: Philip Zimmermann
• Requirements: Mac OS X 10.4 or higher

Download File Size: 379 Kb
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