J.E.L.E.D.

Jewish European Learning Experience Dot.net

Books on Rosh Hashanah and Jewish holidays: (Dutch)

JomJom

Wegwijs in het Jodendom

Van Adam tot Ezra

On the following sites, you can find more information on Rosh Hashana and Judaism in general:

http://www.ucalgary.ca/~elsegal/EliMahzor/EliMahzorGlossary.html#Rosh

http://www.wujs.org.il/activist/activities/programmes/rosh_hashana/index.shtml

http://www.ou.org/chagim/roshhashannah/default.htm

http://ohr.edu/index.php

http://www.virtualjerusalem.com/judaism/

http://www.jewfaq.org