Broker_Extractor is an LDB datasource/tooltip anchor that displays herb and ore collection data, as well as providing milling/prospecting information in the herb/ore tooltips. There are other refinements planned for the future as well, but for now, its intent is to give access to extensive herb/ore gathering information in-game to save you having to swap out to an external db site.
Linkies:
Screenshot
Project Page (Bug Reports)
Download (via Curse)
Feature requests and discussion here. Thanks.