Site Spinner and WYSIWYG Web Builder seem to be generating the most discussion with the highest positive comments.
But neither is an exact match to what CSB offers.
You should download the TRIAL of each and test out. See what you think.
Post your comments or questions under the software and we'll see if we can help.
I am starting a chart that compares the products to CSB but it will take a while before I am ready to post it (and even then, it will be an evolving chart.