Minecraft wiki entry for Before_1.8, associated text: All plants, wheat crops and mushrooms (excluding full block plants)
Beacon
Buttons, tripwire hooks, and levers
Carpets
Flower pots
Glass and stained glass
Glass panes and stained glass panes
Glowstone
Heads
Ice and packed ice
Ladders
Snow (a shovel is required to obtain snowballs.)
Paintings and item frames
Rails
Redstone dust, redstone torches, redstone repeaters and redstone comparators
Redstone lamps
Vines (shears are required to obtain the item.)