Couple things I've noticed in this review of xenforo: http://www.forum-software.org/xenforo/review Xenforo was rated 5/5 stars, great, but it says Xenforo doesn't have the following: Topic Tags: Available as an addon called Tinhte Xentag Related Threads: Available as an addon called: Similar Thread for Xenforo and View More Thread Same Subforum Detect Duplicate Threads: Available as an addon called: Similar Threads Check (Google) Spell Checker - Automatically available in most browsers. Post by Email - Apparently no forum softwares use this. Suggestions on how to make one has been posted in this thread. Export Private Messages Abnormal Behavior Detection Backup Database Prune Database Restore Database Which addons do we have that covers what's missing? They rated ease of plugin installation very low but Add-On Installer by Chris Deeming solves this.