When a new topic is made and its similar to existent topics, a message with list of topics with similar subjects will first be displayed urging the user to see if perhaps this new topic is not needed.
This is a fantastic tool to prevent double posts and especially help the user to find what they are looking for and were about to post!
Main Features at glance:
-Ajax goodies subject check (live check on user typing the post subject)
-Administrator and Moderators override
-Tons of of options to choose from like post count, active topics, locked topics, open topics on new window etc etc
-Forum exclusion/inclusion granular control (ACP > FORUMS > Enable/disable for X forum)
