European Association of Mayanists (Wayeb) - the information hub for research, events, and contacts for Maya studies in Europe; co-organisers of the annual European Maya Conference; lot of resources and links to epigraphic materials
Introduction to Maya Hieroglyphs (pdf) - An extensive handbook written by Harri Kettunen and Christophe Helmke which has been
used as the standard introductory reference material for the European Maya Conference Hieroglyphic Workshop
since 2002. The authors have continually revised and extended the book from year to year, so this is the 12th edition.