Den Plans (click the link for your rank)
Tiger Den Plans
Wolf Den Plans
Bear Den Plans
Webelos Den Plans
Arrow of Light Den Plans
Cubcast is an audio podcast featuring a variety of how-to and information topics for Cub Scouting leaders and parents.
http://www.scouting.org/scoutsource/CubScouts/Leaders/Cubcast.aspx
Baloo's Bugle is a monthly collection of program helps for Cub Scout leaders. Each month a new edition is published with ideas for the following month's Cub Scouting theme near the beginning of each month. Each month's issue features monthly theme stuff, training tips, Tiger activities, Pack and Den activities, traditions, Pack administration helps, fun foods, games, Webelos materials, and lots of stuff to make a Pack meting really sparkle like gathering activities, opening ceremonies, skits, stunts, cheers, songs, audience participation activities, advancement ceremonies, closings and Cubmaster minutes.
http://usscouts.org/bbugle.asp
U.S Scouting Service Project - Scouting Websites for Scouters by Scouters
http://usscouts.org/start.asp
MacScouter - Scouting resources on-line
http://macscouter.com/