LoudHush 1.3.11 (by Modulo Consulting)
LoudHush is a softphone application for Mac OS X.

IaxDissect 1.3 (by Modulo Consulting)
IaxDissect is a Inter-Asterisk Exchange protocol dissector.

DooBar 0.4.1 (by Modulo Consulting)
DooBar is a disk usage browser for Mac OS X that allows you to sort directories based on size so you can figure out how your HDD space is used, stop the information gathering process at any time by pressing the stop button and maintain a history of browsed directories via the back and forward button

LoudHush 1.3.11 (by Modulo Consulting)
LoudHush is a softphone application for Mac OS X.

JackenIAX 1.0beta v213 (by Jack Zimmermann)
Want to be able to make phone calls around the world from anywhere? Answer your home phone from a hotel in Tokyo? Well, you can with JackenIAX and an Asterisk server or using an VoIP provider that supports the IAX2 protocol.

TRx 3.01 (by NCH Swift Sound)
TRx is a phone call recorder program for desktop computers.

Asterisk 1.2.12.1 (by mezzoConsult C.B.)
Asterisk is a complete PBX in software.

X-Pro-Vonage 2.0 (by Vonage, Inc)
X-Pro-Vonage is a VoIP software solution that offers the freedom and convenience of making and receiving calls from your Mac using the Vonage service.

X-Lite 2.0 build 1106q (by Xten Networks, Inc)
X-Lite is a FREE premium SIP softphone with many PBX-like features.

Gizmo 2.0.0.161 (by SIPphone)
Gizmo is an Internet telephony application, designed to look like the popular iChat instant messaging application.

Call Recorder for Skype 1.0.7 (by Ecamm Network, LLC)
Finally, an easy way to record your Skype calls and podcasts.

Ovolab Phlink 3.1 (by Ovolab)
Ovolab Phlink, combined with the Ovolab Telephone Adapter, can answer telephone calls and identify the caller using Caller ID and Apple's Address Book.

MacDial for Asterisk 1.0.1 (by equinux USA Inc.)
MacDial for Asterisk is a unique OS X product which allows for easy one-click dialing on phones connected to an Asterisk PBX directly from Mac programs, databases, the Mac OS X address book and FileMaker.

Skype 2.0.0.6 (by Skype Technologies S.A.)
Skype is the next phenomenon from the people who brought you KaZaA.

Ovolab Phlink 3.1 (by Ovolab)
Ovolab Phlink, combined with the Ovolab Telephone Adapter, can answer telephone calls and identify the caller using Caller ID and Apple's Address Book.

BluePhoneElite 1.1 (by Reel Intelligence)
BluePhoneElite extends the calling features of your cell phone to OS X with a simple yet powerful interface.

Send SMS 1.7 (by Alco Blom Software)
How do you send an SMS? Are you using the T9 input method? Are you also wondering why you are using these small keys with numbers on it to enter text while you have your Mac keyboard in front of you?
Then the Send SMS widget is for you.

Hold On 0.6 (by Wooden Brain Concepts)
HoldOn lets you use your build-in modem as a speaker phone to listen to the line while on Hold.