VoIP conference software comes in two basic varieties: free and commercial.

The free VoIP conference software packages tend to be difficult to setup and use; the commercial VoIP conference software packages tend to be slick and easy to install and use.

Of course, the commercial VoIP conference software packages also come with setup fees and recurring costs for conference room access.

Which option you choose depends upon your budget of time and money.

Free VoIP Conference Software

GnomeMeeting

GnomeMeeting is an H.323 compatible videoconferencing and VOIP/IP-Telephony application that allows you to make audio and video calls to remote users with H.323 hardware or software (such as Microsoft Netmeeting). It supports all modern videoconferencing features, such as registering to an ILS directory, gatekeeper support, making multi-user conference calls using an external MCU, using modern Quicknet telephony cards, and making PC-To-Phone calls.

Gspeakfreely

Gspeakfreely is a VoIP system with a flexible component system. It implements a set of audio processing components which can be connected to each other or mixed together. The most important components are net in/output, which implement VoIP functionality and the OSS-DSP in/output component.

Additionally there is a ISDN in/output component that allows making actual phone connections, and a file input component that can also play Internet radio streams. Also included is a fading plug-in, that can for example fade incoming calls into your music. New components can be developed for specific purposes, and combined with existing ones.

The net in/output components also have conference support. The net input component can mix incoming audio data from different hosts.

Commercial VoIP Conference Software

Voice Now

Scheduling private conversations and conference calls is now as easy as visiting a web page. Voice Now’s VoiceTech Communicator is a ready-to-run software application that has been designed to enhance existing public Internet and Voice over IP (VoIP) networks to include scheduled and instant conferencing services.

VoiceTech Communicator users can schedule their own IP based discussions or conference calls and then call in using a personal computer. VoiceTech’s software-only architecture provides business conferencing with an unparalleled degree of flexibility at a reasonable cost.

Voice Now charges an annual fee for their service.

Icon Communicator

Icon Communicator is a modular software program which supports voice, conferencing, text-chat, and desktop sharing.

Icon Communicator is priced with a small setup fee and a monthly recurring fee for access to the Conference Centers.

The Icon Communicator is sold with an odd MLM (Multi-Level-Marketing) sales model. Theoretically, you can earn money by using and recommending this service to others.