For many Minecraft users, the most annoying part of the game is creating buildings and structures when your resources are limited and must be gathered. This mod changes everything. If I had to choose 3 essential mods, Id choose Xray, Night Vision, and Too Many Items. It is essentially an in-game INVedit that works on SMP (Multiplayer), given you have admin permissions.

Too Many Items Mod for Minecraft 1.9 Features

Add items to your inventory (If on SMP, you dont need to know the item ID #. This is very helpful)
Unlimited Stacks
Save and Load up to 7 Inventories (SP Only)
Put items you dont need in the trash (SP Only)
Get previously unobtainable items such as leaves and bedrock in your inventory



How to Install Too Many Items Mod 1.9 for Windows

Go to Start Menu
Click on run
Type in %appdata% (without quotes)
Find a folder named /.minecraft/ go inside and find a /bin/ folder.
Delete the /bin/ folder.
Open up minecraft and log in. This will re-instate your /bin/ and is called cleaning your folder.
Inside the new bin folder you should find minecraft.jar
Right-click on it and choose open with WinRAR/7Zip
Drag the files into minecraft.jar.
Delete a folder called META-INF
Congratulations, youve installed Too Many Items 1.7.2!

How to Install Too Many Items Mod 1.8.1 for Mac

Type in the following command line by line
cd ~
mkdir mctmp
cd mctmp
jar xf ~/Library/Application\ Support/minecraft/bin/minecraft.jar
Dont close the terminal yet, you should find a mctmp folder located inside your users folder
Go inside, copy all the files from Too Many Items into mctmp folder
Back to Terminal.app, again type in the following commands
rm META-INF/MOJANG_C.*
jar uf ~/Library/Application\ Support/minecraft/bin/minecraft.jar ./
cd ..
rm -rf mctmp
Finished !
Too Many Items Mod for Minecraft 1.9 Hotkeys

Type O to turn on/off
Shift+Click for unlimited