Very nice plugin

There are many knowledge base plugins available, but most of them only provide basic features for free (if any). The free version of Echo-KB offers a surprising amount of options. Additionally, the price of add-ons is very reasonable.
Furthermore, it has an easy-to-use interface that enables you to modify the main knowledge base page, such as the default text for search buttons, etc. The last is particularly useful for a non-English website. Furthermore, it seems to work well with a Right-to-Left website without any CSS tweaks, which is not true for most plugins and themes out there. Well done!