Small growth habit lilies:
Helvola (dwarf)
Joanne Pring
Berit Strawn
Andreana
Froebeli
Laydekerl Lilacea
Indiana
Little Champion
Little Sue
Perry's Baby Red
Perry's Red Dwarf
Lucida
Solfatare
Aurora
Chrysantha
Liou
Burgundy Princess
Walter Pagels
Ellisana
Rubra
Tetragona
Charlie's Choice
Candida
I'm sure there are a few more, so maybe someone else will add to the list.