Janeth, The list is very long for a straight answer....upright grower, weeping varieties, red,green,yellow,variegated,dwarf,large,etc,etc.
AL

Depends on where you are located :-) Full sun in MO is not the same as full sun in WA! But in those areas that get strong summer sun combined with a lot of summer heat, there is a short list of JM's that are more suited to full sun conditions than others. I would avoid any variegated or reticulated forms - delicate foliage or that lacking sufficient chlorophyl is more easily damaged by full sun.

Here is a link that might be useful: Japanese maples for full sun