ItemLinker allows you to link items in chat without having an item or looking through your inventory/bank. In addition, you can get the item tooltip for any item in the game. By using the search box of this minimalistic interface you can search through all the items in the game. Shift-Click if you want to post the link into chat. Left-Click to get a pop-up of the tooltip.
For example, in the ItemLinker UI image you can see a search for "Jade Panther" and all items with "Jade Panther" in its name are listed. By Shift-Clicking you can see the item link in the chatbox.
SLASH COMMANDS:
/il
/itemlinker
/il [text] - will search for [text] in ItemLinker without having to pull up the window *Important*
/il hide - will hide the window