http://www.bigbluebutton.org Big Blue Button is free open source software (FOSS) that creates a web conferencing system. It is available for download at their web site or at SourceForge.net. At this writing 11.09.14 there are no binaries to download and install for specific architectures and operating systems. The service installer needs to download all necessary "C++" compilation utilities and libraries, configure the source code as directed in a readme file, "make" (compile) the code for their server, test use it and then install it for public or private user use.