Scroll down the page to "Update Toast 5.0 Titanium or later to 5.2.1 (compatible with Mac OS 9.1 and higher, including Mac OS 10.3." The download link is there.
I don't know about a free download, but I did notice that Toast is offering a discount on the latest version of Toast by a special email to existing registered users of Toast. It came a couple days ago.
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