Have you ever been playing in a big modpack, or even regular Minecraft, and you have no idea what in the world the item you just found does? This is a solution for you.
With this mod, all you have to do is type /wiki <search term> and it will open up an information source in your default web browser automatically.
WikiLink is super easy to use, making getting information on mostly every item in the game a breeze. You can open the WikiLink menu GUI by pressing the default key ? I ? (Configured in NEI keybindings menu) while hovering over an item in your inventory or the NEI item panel. The WikiLink menu will display a series of information sources based on that particular item including Wikis, Google links and even YouTube videos.
You can select any of the information sources by clicking on one of the brown boxes until it turns green. When selected, you can either open the link automatically in your default browser or you can copy the link directly to your clipboard so you may paste it in the chat or send it to a friend.
If you want to add different wikis for different mods, those are now handled by the mod author. If you would like to request a mod to be added to WikiLink, please contact the author of the mod. However, here are the three built in wikis I have installed with their keys: