A few that (I don't think) anyone's mentioned:
Otep
If you like/don't mind hip-hop influence
Straight Line Stitch In This Moment
More like, if Pat Benatar had gone metal... but then again, staring at Maria Brink kinda makes up for it!
And some friends of mine:
Saved By Ruin
Young, but a lot of potential! (that sounds creepy, didn't mean it that way...

)
Easybake
Southern garage rock/punk, best enjoyed in public with alcohol while watching the singer hit on your girlfriend
Viva la Venus
Not metal, either, but fronted by
three hot chicks
