All Gadgets
Shaker
by eneskp3441
Shaker is the shaking effect tool developed for godot. In general, it can be used for multiple purposes and you can edit the shaking effect you want in detail and use it for any Node you want.

Pigmint Controls 2D
by echopraxium
A Godot plugin which provides custom controls for 2D painting / drawing applications. This plugin currently provides 2 custom "ColorSelect" controls meant to let the user select Foreground/Background colors

Stairs+ 3D
by hugo
Lightweight tool to quickly create and edit efficient 3D stairs.

2D drawing by code (gdscript)
by aiaf
Example showing 2d drawing by code Features: line multiline polyline rectangle circle string multiline_string arc texture dashed_line polygon Also includes label and button
Nested saving and loading
by steffenschumacher
Nested saving and loading plugin for Godot 3.5 is a small library (only 131 lines of code) which implements saving and loading with the possibility of saving nested Nodes, which each have their own distinct state.
Kataru
by katsutoshii
The minimal YAML-based dialogue engine. https://kataru-lang.github.io/#/
Addon Toggler
by ethereal
Make addon development faster by having a shortcut on the top right corner of the editor to toggle on/off other addons Click the "View Files" button below to see the Github repository.

ScreenSwitcher
by soulnetworx
Faster screen management to run your application out of the editor without going deep into Godot's editor settings. The menue appears in upper-right corner (when you activate the plugin)
Numberclass
by swcreeperking
A class for creating larger than life numbers limit is ee16 (1 * 10 ^ (1 * 10 ^ 16))

ChartGraph
by chrisskeddy
A tool that allows the creating of graphs/charts. Current Supports LineGraph and some Pie Charts. example_ChartGraph folder contains all examples and can be deleted.
APRUM
by demurzasty
Addon that provides multithreaded task dispatcher to efficiently distribute tasks across multiple threads. It allows you to offload CPU-intensive tasks from the main thread to improve performance and responsiveness of your Godot applications.
ByteKruncher
by dickvisser
Converts gdscript objects to bytes and vice versa, to save bandwidth or disk space.