Website Maker : flash- and internet-based, current version number is 5 (though there are constant updates and new features, so the version numbers are more or less milestones); yes, there is a free trial at http://www.magix-online.com/uk/website-maker/offers-prices.2611.html (below the the price table).
Web Designer: locally installed software product, current version number is 6. And there is no free trial download for that one.