This glossary provides an overview on essential tools for virtual facilitation. It has been elaborated by the RTVC team: Sofia, Hans, Stephan, Suresh, Lucy, Holger, Julian and Michael and enriched by tools taken from the Knowledge Sharing Toolkit of CGIAR. We understand the concept of virtual facilitation in a broad sense, so we have included tools for sychronous and asynchronous conversations. Feel free to ad the tools you like. This glossary works like a wiki, so every registered user is allowed to add, edit and comment.