We've used (and continue to use):
English - 2, 3, 4, 5, 6,and 7 (7 for the first time this year)
Spelling - 2, 3, 4, 5, and 6
Penmanship - 1, 2, 3, and 4
I really love these programs!
I enjoyed Science 2 and 3, but it wasn't quite enough for my science loving boys.
I used Math 3 as a break from Saxon with my oldest. It went over rather horribly and we went back to Saxon.