Quorum Call Conference Software
Quorum is software which runs as a phone conference server on any Windows PC. Callers dial into the server to join telephone conferences. Callers can connect to a conference call using either standard or VoIP lines on external telephone numbers or through an office phone system. ... The conference creator then gives this number to each conference participant. ... When the caller selects the option to create a new conference Quorum will assign and read back the unique and secure conference number.
http://www.audiochannel.net/software/quorum.zip - 947Kb - Download - Screenshot

Bombino (2) 2005
Bombino is a small but powerful skype plugin for creating conferences on-demand via SMS. After being installed it acts as a server. It receives SMS-commands from a (remote) user, checks privileges and creates the requested conference. It can be used to call skype user from ordinary phone also. ... The maximal number of conference participants is 2 for this Bombino version.
http://www.icebrains-soft.com/bombino_2005_download - 2Mb - Download - Screenshot

Bombino (3) 2005
Bombino is a small but powerful skype plugin for creating conferences on-demand via SMS. After being installed it acts as a server. It receives SMS-commands from a (remote) user, checks privileges and creates the requested conference. It can be used to call skype user from ordinary phone also. ... The maximal number of conference participants is 3 for this Bombino version.
http://www.icebrains-soft.com/bombino_2005_download - 2Mb - Download - Screenshot

Bombino (4) 2005
Bombino is a small but powerful skype plugin for creating conferences on-demand via SMS. After being installed it acts as a server. It receives SMS-commands from a (remote) user, checks privileges and creates the requested conference. It can be used to call skype user from ordinary phone also. ... The maximal number of conference participants is 4 for this Bombino version.
http://www.icebrains-soft.com/bombino_2005_download - 2Mb - Download - Screenshot

sharpVoice(tm) Client
sharpVoice (formerly CyberTalkOnline) is a mature, reliable internet telephony program that enables free PC-to-PC and inexpensive PC-to-Telephone voice conference calls. sharpVoice Version 6. 0 offers great sound quality even over slow internet connections and the ability to conduct multi-person... Then you must register to make multi-person conference calls, PC-to-Phone calls, and to avoid advertising. ... Contains no SpyWare. ... Fully functional and ad-free for 30 days. ... Network-friendly design lets you make and receive calls even if you use a firewall or proxy server.
http://www.sharpvoice.com/download/sV6Setup.exe - 1Mb - Download - Screenshot

VaxVoice Extended SDK
Vax Voice activeX is the easiest way to add PC-to-PC voice chat and text chat over the LAN, WAN or Internet in your applications and Web pages. You can add many new voice and text chat related features and discover just how much better your application and web pages can be, with: - ENCRYPTED... - TEXT CHAT: During the conference, you will be able to have text chat. ... - MULTIUSER VOICE CONFERENCING: Using this feature, three or more people can have a real-time voice conference. ... 6Kbytes/Second for a single voice session.
http://www.vaxvoice.com/market/vaxvoiceext/vaxvoiceextsdk.exe - 2Mb - Download - Screenshot

Split Video Chat for Video Conference
SplitCamera is a freeware virtual video clone and split video capture driver for connecting several applications to a single video capture source. Usually, if you have a web camera or video camera connected to your computer, you cannot use it in more than one application at the same time, and... You can as well use splitcam to send your home videos at the same time to many video conference programs, for example your friend using MSN messenger can see your home video or your favorite DVD disk live and other friend uses Yahoo messenger want to see it too so how can you at the same time to...
http://www.splitcamera.com/setup.exe - 3Mb - Download - Screenshot

VidSpeak
VidSpeak is a free multipoint video conferencing application for your PC. Use your broadband connection to video and audio conference with more than one person at a time. Free for personal use.
http://www.vidspeak.com/downloads/vidsetup.exe - 2Mb - Download

conaito VoIP SDK ActiveX
conaito VoIP SDK ActiveX for developers of VoIP audio applications and webpages, such as voice chat, conference, VoIP, providing real-time low latency multi-client audio streaming over UDP/IP networks. Includes efficient components for sound recording, playback, encoding, decoding, mixing,... conaito VoIP SDK is the best way to add voice conference and text conference into your application and web pages. ... conaito VoIP SDK includes voip activex, voip ocx, voip com, voip dll, voip lib and voip cab, so you can use the one you like the most!
http://www.conaito.com/trialdownloads/ConaitoProxySDK.zip - 768Kb - Download - Screenshot

Video Chat Splitter
Video Chat Splitter driver allows you to easily multiply your web-camera (any models), video cameras ( any model: analog or ditial : VHS, DV, TV-IN or TV-tunner ) in video chat or video conference software like ICQ, Yahoo Messenger, MSN Messenger, Skype Video, Camfrog, AOL AIM, Pal Talk, or... You can as well use splitcam to send your home videos at the same time to many video conference programs, for example your friend using MSN messenger can see your home video or your favorite DVD disk live and other friend uses Yahoo messenger want to see it too so how can you at the same time to send...
http://www.splitcamera.com/PAD/download/VideoChatSetup.exe - 3Mb - Download - Screenshot