On several request of my Sister, i searched many marriage card site. The only reason behind it was the better wording she needs for her marriage card.
I searched so many of them and found little bit of useful. Most of them are having same wordings list.
At last she found something useful :)
The site, i found, having best wedding cards format is
Rest of them having useful wedding card wording :
This one is also nice : http://www.bringwedding.com/
Have a nice time in selecting the format :)