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Asterisk Asterisk is an Open Source Private Branch Exchange (PBX) and general telephony toolkit. It is a kind of middleware, between Internet and telephony channels, like (Voice over IP, Voice over Frame Relay, etc.) and telephony and Internet applications (like voicemail, phone directories, call parking, calling cards, etc). AsteriskC2D AsteriskC2D is asterisk click to dial from almost any application Gizmo Project Gizmo Project is a program that uses advanced VoIP technology to allow you to talk with your friends around the world. Gizmo Project uses your Internet connection to make calls to people using other computers. It is simple, and allows you to talk clearly and for as long as you want. IaxDissect IaxDissect is a dissector for the Inter-Asterisk Exchange protocol. It can be useful to troubleshoot IAX problems. Marratech (commercial) Marratech offers group video conferencing with H.323 & SIP support. Megafon Megafon is an easy to use Internet phone for Mac OS X providing crystal clear voice quality in an attractively sleek GUI interface. The quick one-step configuration will allow you to get talking to other Megafon users in seconds. Simply dial the number of the person you wish to talk with or select them from the Phonebook to dial their number. Silica Silica is a heads-up display for Caller ID under Mac OS X 10.3 and higher. Skype Skype uses P2P (peer-to-peer) technology to connect you to other users ? not to share files, but to talk and chat with your friends. Read more SkypeMenuX SkypeMenuX provides a Mac OS X System Extra menu for Skype. This menu allows you to view and change your Skype user status and launch or quit Skype. SpoofCard The SpoofCard Widget allows you to change what people see as your Caller ID number when they receive your call. Voix Phone Voix Phone Is a multiplatform IAX soft phone, its engine derives from Voix Manager, the powerful Asterisk call manager interface, from wich it inherits stability and robustness. X-Lite X-Lite is a fully functioning softphone featuring many of the popular features of eyeBeam. With your existing connection to a VoIP or broadband service (e.g. Vonage, BT, AT&T) or an IP-PBX connection (e.g. Asterisk, enterprise LAN), it allows you to make calls to any softphone, mobile or landline number.