I haven't led a Cadette troop, my oldest daughter
was a cadette and she had an awesome leader.  
Here are some resources she has gathered (the
daughter, not the leader.  Surely the leader has
more, but I doubt she has a website!

Get Organized, a project designed to help girls
organize their personal spaces

Home is Where the Heart is.  I was really glad to see
this project.  I get annoyed with all of the constant
references to career and money and shopping for
the girls.  How liberated do women have to be to
realize that home matters?

On Your Own helps girls learn real life skills they'll
need when they move out of their parent's house

Sew Glam helps girls learn about sewing and
fashion design

The Girl Scout
Silver Award is the second highest
award in Girl Scouting, it's a long term community
service project that girls lead and organize on their
own.