stART aka Christina Vandervlist, CZT has created a Zentangle Glossary.
Another new CZT, JayCadian202 supplied this link to incompetech.com/graphpaper/, where you can find these really cool Grid Paper PDFs. It has graph papers for squares, triangles, circles, hexagons, octagons, bricks, celtic interlace, perspective, and writing. There is a graph generator that allows you to set the grids to inches or centimeters, as well deciding what document size and what grid spacing you want. This site is fun!