Do you and your fiance have an organization that is dear to your heart? If so, consider making a donation on behalf of all your wedding guests to that particular organization. You can decided how you want to do this. Some will take a percentage of the money they were given as gifts, and use that as the money they donate. Maybe you just decide on a particular amount and give that on behalf of your guests.
Instead of a box or tin of candy at each place setting, design a candy table where your guests can go and fill a sack of their favorite candy. You can do candies in your wedding color palettes or just pick your favorites as a couple. Makes a fun date night to go and pick all the special candies for your special day.
Perhaps you want to make it a little more personal. You can find very inexpensive small frames, then order wallet size photos of your engagement pictures, and place at each setting.
Hopefully this gives you a place to start!