There's always gesundheit! (Good health)
I say bless you. No religious thought to it. Purely habit/cultural norm.
I never thought it to be taking the Lord's name in vain because the original intent was really asking God to bless the person.
Mom to Elizabeth (6) and Corinne (4)
In Japan, they don't respond to someone's sneezes and it took me a while to not automatically say 'bless you." I am a good little robot.
Language is really amazing. Goodbye is from 'God be with ye' but I don't even consider that I am saying go with God. 'Bless you' after a person sneezes has the same religious weight in my mind.
I think the 'excuse you,' response must be cultural/regional. I think I'd get a dirty look if I said 'excuse you." lol
I do clearly remember being taught and hearing messages about not saying God Bless You unless you really mean it. To each their own though.