It's the Little Things Mod (1.21.1, 1.20.1) – Some Small Features

It’s the Little Things Mod will add new functionality useful for modpack creators: you will be able to change the game title, select automatic launch of the game in fullscreen mode, change the game icon in the taskbar, and enable a notification mode when using the 32-bit version of Java (for modpacks).

Features:

Allows you to make the Modpack yell at people using 32 bit versions of java. This is off by default.

Allows you to make Minecraft open to full a fullsize window instead of the normal small one.

Allows you to set the title of the Minecraft window.

Allows you to change the icon of Minecraft in the taskbar.

This mod can also auto-detect these things if you are using the Technic Launcher without you having to configure anything. Works out of the box.

Adds a custom dedicated server to the server list.

It’s the Little Things Mod Download Links

For Minecraft 1.21.1, 1.21

Forge version: Download from Server 1 – Download from Server 2

Fabric version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.2

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.1, 1.20

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.4

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.3

Forge version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.2

Forge version: Download from Server 1

For Minecraft 1.19.1

Forge version: Download from Server 1

For Minecraft 1.19

Forge version: Download from Server 1

For Minecraft 1.18.2

Forge version: Download from Server 2

For Minecraft 1.17.1

Forge version: Download from Server 2

For Minecraft 1.16.5

Forge version: Download from Server 2

For Minecraft 1.15.2

Forge version: Download from Server 2

For Minecraft 1.12.2, 1.12.1, 1.12

Forge version: Download from Server 2

For Minecraft 1.7.10

Forge version: Download from Server 2

For Minecraft 1.8.9

Forge version: Download from Server 1