THIS SITE IS NO LONGER ACTIVE
Christian Soulmates is 100% free which is nice. For a free site you will find that it offers most of the features a good dating site should have.
The sites design is a bit outdated but it has all the functions that you need. There appears to be a pretty decent size member base but unfortunately many of the quick matches the site provided were scammers and the advanced search feature didn't allow search by zip code, which was inconvenient.
If ChristianSoulmates.com cleans up their site and provide better monitoring it could be a nice site for single Christians to meet and fellowship with one another.