Roughly Enough Resources Mod for Minecraft

You should definitely download Roughly Enough Resources Mod for PC-version of Minecraft. Why? In front of you is an analog of the mod JRE, but for REI, and it adds to the game useful info about getting different resources, for example, with what probability and from which mob you can get this or that item, when destroying what block and what item you get this or that resource or item (drop.).

The mod also shows info about the generation of ore at different altitudes and other useful information that will be useful in large builds with a lot of mobs, items and measurements.