I used to be able to search/filter by specific criteria, such as 100% free, but now that appears to be gone. Am I missing something, or has this been removed?

Well it has not gone it's still here (but it has never been on the search results, only on the listing pages)

You need to click on More options

Ahh, first you have to click on one of the categories, OK. I guess that's what I've always done then, if nothing has changed. Seems like this would be a great addition to the search page? So you could search a keyword and filter those results?

Thanks folks!
-Joseph