有些程序目前的已经商业化,不开源,但是还是可以找到其以前的开源版本。
Skype
P2P software for high-quality voice communication.
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Author: Skype Technologies S.A.
Screenshot
[Development Status] 4 - Beta
[Environment] X11 Applications :: Qt
[Intended Audience] End Users/Desktop
[License] Freeware, Other/Proprietary License
[Network Environment] IP :: IPv4
[Operating System] Microsoft :: Windows :: Windows NT/2000/XP, POSIX :: BSD :: FreeBSD, POSIX :: Linux
[Topic] Communications :: Conferencing, Communications :: Internet Phone, Communications :: Telephony, Multimedia :: Sound/Audio :: Speech