Gossip Table
Visual NPC Gossip Editor
Overview
Gossip Table is exactly as it appears--a visual editor for NPC gossip.
How The Heck Do I Use This?
Operation's pretty self-explanatory, fortunately; however, this is with two caveats. The menu must be toggled via the /gtable or /gossiptable commands, and editing only functions effectively if an NPC has debug mode enabled. You need only extract the GossipTable.zip to a commiserate GossipTable folder under your addons!
GossipTable.zip