pdfpc is a GTK based presentation viewer application for GNU/Linux which uses Keynote like multi-monitor output to provide meta information to the speaker during the presentation. It is able to show a normal presentation window on one screen, while showing a more sophisticated overview on the other one providing information like a picture of the next slide, as well as the left over time till the end of the presentation. The input files processed by pdfpc are PDF documents, which can be created using nearly any of today's presentation software.