Following are often forced as well:
Crocus vernus
Hyacinthus orientalis
Iris reticulata & I. danfodiae
other "spring bulbs" that are quite forcible (but not forced as often)
Ipheion
Crocus sativus & C. chrysanthus
Chionodaxa
Puschkinia
Bellevaria pycnantha
Galanthus
Scilla
Anemone blanda and A. coronaria
Camassia
Fritillaria - smaller ones, like F. meleagris
Lilium
Convallaria majalis
Hyacinthoides hispanica
Allium --> including A. moly, A. neapolitanum, A. karataviense, & A. schubertii
Triteleia
Erythronium (cool greenhouse)