MyPhone is Voice&Video IP Telephony Chat client. It is H323 protocol compatible, based on OpenH323 project (www.openh323.org). Client is written in VC++, using MFC/PWLib libraries, compatible with any reasonable M$Windows version. Freeware&OpenSource.
Main features:
• Direct PC-2-PC communication without any intermediary.
• H323 Gatekeepers support.
• Video communication with 176x144 (QCIF) and 352x288 (CIF) resolution.
• Audio communication with a number of selectable codecs and quality.
• Compatible with NetMeeting, GnomeMeeting and many other H323-based software and hardware.
• Can transmit voice even through low bandwidth modem lines.
• Easy to setup and configure.
• Multilingual (English, Русский and more...).
• It's absolutely FREE and OpenSource! Get the source code here: CVS. It is under Mozilla Public License.