queries on some old free modules

[zlefin]

I was looking for modules; and read that wotc put out a bunch of old free modules for 3.x a long time back; but that many of the links were broken at some point.
I found a link that still had some of the modules.
edit: apparently the link I'd used wasn't valid as a link, despite it being the address in the bar whree I'd found stuff.
question 1: I wanted to make sure everything's legal with using them, as I hadn't heard about this in the past.
question 2: I was wondering if someone knows of a source which has all the modules now (as the wotc links are broken, and the sources i've found seem to each be missing a bunch of the modules)

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