Have you noticed that resource production takes a long time in Stardew Valley? The Automate modification can solve this problem. Place a chest next to a machine (such as a furnace or crystallary) and the machine will automatically pull raw items from chest and will return processed items to it. Connect multiple machines with a chest to link them. This way you can automate the production of resources.
Flexible and easy to use in-game menu with plenty of cheats for Stardew Valley.
Farm Type Manager (FTM) - a utility for Stardew Valley that allows you to edit and create any objects on the map. As an example, you can spawn monsters (or any other objects) with a certain chance in a specified location at a specified time. There are ready-made mods that are automatically integrated with FTM.
This mod allows you to buy a tractor (and a tractor garage) in Stardew Valley to more efficiently manage crops, clean branches, rocks, etc.
If you are a newcomer to the game Stardew Valley, then the Lookup Anything mod will be indispensable for you. It will show detailed information literally about everything. Hover your cursor over the object or character of interest to you, press F1 and detailed information about it will appear.
The Content Patcher mod will add a utility that will allow you to add and dynamically change in-game events, maps, characters, and more. However, content packs for Content Patcher must be installed manually.
SMAPI - Stardew Modding API - is a utility for Stardew Valley that will allow you to install most of the game's mods. Follow the installer instructions.