The best of free filtering plugins

I’ve checked multiple filtering plugins and found this the best one, at least as far as free versions are concerned.

It supports filtering by names, tags, attributes, etc. with multiple types of the select box appearance, including selecting multiple values of the same taxonomy and defining the logic operation (AND, OR) when multiple values (both inside one and across taxonomies) are selected.

AJAX updating (without reloading the whole page) works well.

While I could still imagine a few improvements, I can surely recommend using this plugin.