HTML Purifier 4.2.0
HTML Purifier v4.1.1
HTML Purifier v4.1.0
HTML Purifier 4.0.0
HTML Purifier 3.3.0
HTML Purifier 3.2.0
v3.1.1.2 actually works, but includes one extra feature that snuck in.
Tag v3.1.1.1, functionally the same as v3.1.1 but more Git-friendly