OU Presents Rosh HaShana - http://www.ou.org/chagim/roshhashannah/ About the holiday, as well as advanced articles. Also includes a collection of audio links.
Rosh HaShanah with Torah.org - http://roshhashanah.torah.org/ Project Genesis has educational resources, observances, and recipes.
Chabad.org - Rosh Hashanah - http://chabad.org/holidays/JewishNewYear/template.asp?AID=4644 Contains information about services, study, stories and recipes. Includes Kids section. Features Find-a-Service and E-Shanah Tovah cards. Also covers Ten Days of Repentance.
The Virtual Beit Midrash - http://www.vbm-torah.org/rosh.htm A series of advanced lectures on Rosh HaShana, both philosophical and halachic. A resource for the serious student.
A Straight or a Twisted Shofar? - http://www.biu.ac.il/JH/Parasha/eng/rosh/fis.html Staff at the Bar-Ilan University's Parashat Hashavua Study Center discusses what kind of ram's horn to use as a shofar.
Rosh Hashana: Activity Ideas - http://www.jajz-ed.org.il/festivls/tish/04.html Includes specific activities for age specific classes and groups.
Help build the largest human-edited
directory on the web.