ChickenChunks

In Minecraft, the world is divided into chunks - 16×16 block areas that are loaded only when a player is nearby. If there are machines, plants, or other objects requiring processing in a chunk but no players are nearby, nothing will happen.

The ChickenChunks modification solves this problem by adding a special block - the chunk loader. Once placed, this block maintains the loading of surrounding chunks even when no players are nearby or in offline mode. Now your farms will grow and automatic systems will continue working while you're busy with other activities.