Slime Chunk Finder (Slime Chunker)
We present to you a unique mod for Minecraft 1.11 that will help you find slime chunks!
This is an extremely simple addition that displays on the screen (with toggle capability) a text message indicating whether you are currently in a slime chunk. While this is not enough to find all chunks, this tool is perfect for precisely determining boundaries when building slime farms.
Installation: Install Forge for version 1.11, then simply move the mod file to the mods folder.
Controls: Press the "G" key (default, can be changed) to toggle the information display.
Seed setup: To set the world seed, find the config folder in your Minecraft directory and open the slimer.cfg file. Replace the value 0 in the configuration with your seed (in singleplayer or with permissions you can use the /seed command, otherwise contact server administrators), then launch Minecraft. You may need to launch the game once with the mod installed to generate the configuration file.

Enjoy using it!