Reliable Multicast Library: RML The RML is a C library developed under QPL. It is intended to guarantee reliable transmission over IP Multicast. We try to develop it in a way that it can be used in a large set of applications. The library runs on GNU/Linux and only require a full functional IP Multicast network to work properly. We provide a simple multicast chat application to test the library and you can found it in the rmchat directory. That is the simple way to learn how to build a multicast application with the Reliable Multicast Library. The Tangram-II Whiteboard (TGWB) is an application built on tgif that uses RML. Further information about TGWB can be found at README.tgwb file. You can download tgif at http://bourbon.usc.edu/tgif/index.html. Documentation is available in the doc/ directory. See AUTHORS for authors' emails and/or homepages. See LICENSE.QPL for information about QPL. See INSTALL file for information on compiling the librmcast. Enjoy it. RML team at LAND (http://www.land.ufrj.br)