A maintained collection of useful & free unity scripts / libraries / plugins and extensions.

• Unity C# Editor
• Unity Default Editor
• Unity C# Script Editor

In Unity, go to Edit->Preferences, and make sure that Visual Studio is selected as your preferred external editor. Doubleclick a C# file in your project. Visual Studio should automatically open that. As an example, if you include the single line -define:UNITY_DEBUG in your mcs.rsp file, the #define directive UNITY_DEBUG exists as a global #define for C# scripts, except for Editor scripts. Every time you make changes to.rsp files, you need to recompile in order for them to be effective.

If you want to suggest a link, then read the Contribution Guidelines first.Please report broken links, outdated assets and spelling mistakes. The links are in no particular order. This list is licensed under the GNU General Public License v3.0 and does only apply to this repository.

I collect links over time in Issue #1, once a month I will categorize them and add them to this list. If you want to get notified about updates, watch this repository or follow me on Twitter.

Navigation:

• Editor

GameObjects & Transforms

• RecyclerKit - pooling system
• UnityOctree - octrees
• In-Game Replay System - record and replay transforms
• Unity Scene Query - library to traverse and query the Unity scene to find particular objects
• UnityTools - Runtime transformation gizmos
• Unity3DRuntimeTransformGizmo - Another runtime transform gizmo

Movement & Animation

• List View Framework - create dynamic, scrollable lists
• Reaktion - audio reaction toolkit
• DOTween - tween engine
• Camera Path Creator - create complex camera paths
• Cinemachine BaseRig - procedural camera system
• UnitySpritesAndBones - skeletal sprite animations
• spine-unity - import spine animations
• ikccd - IK Solver using Cyclic Coordinate Descent

Controls & Input

• InputManager - a powerful input manager
• TouchScript - multitouch library

Character Controller

Unity C# Editor

• Unity 2D Platformer Controller - 2d platformer character controller
• CharacterController2D - 2d character controller
• SuperCharacterController - 3d character controller

AI & Pathfinding

• A Star Pathfinding for Platformers - A* for platformers
• Astar for Unity - A* pathfinding
• A* Pathfinding Project - A* pathfinding
• UnitySteer - steering, obstacle avoidance and path following behaviors
• SimpleTraffic - A simple traffic simulation using Nav Mesh.

Physics

• Mario Galaxy Gravity for Unity - mario galaxy gravity
• Ocean Community Next Gen - water physics/shader
• Voxel GPU Physics - GPU accelerated voxel physics
• Interactive Erosion - Runtime fluid erosion for terrain

Particles

• KvantSpray - gpu accelerated particles
• NVIDIA Hair Works Integration - Nvidia hair works
• Ember Particles - turbulent ember particles
• SPHFluid - Interactive 3D Fluid Simulation based on SPH

Meshes & Construction

• ProceduralToolkit - procedural mesh toolkit/generator
• Draw - draws primitives with lines
• VolumetricLinesUnity - volumetric lines
• giles - 3d runtime level editor
• Voxelmetric - voxel framework
• Procedural Shapes for Unity - procedural shapes
• ICO Sphere Mesh Creator - procedural ico spheres
• Vertex Painter - paint information onto vertices
• FacePaint - paint triangles of meshes
• Simplygon - mesh optimization & lod generation
• TextMesh Pro - generate text with custom styling
• meshcombinewizard - combines all meshes on the chosen gameObject and its children that share the same material
• RoadArchitect - road system creator featuring dynamic intersections, bridges, etc.
• DrawLine - procedural line mesh tool.
• Deform - A framework for deforming meshes in the editor and at runtime in Unity.

Materials & Shading

Unity Default Editor

• Projects by RM - wet surface & skin shader
• Ocean Community Next Gen - water physics/shader
• Flow Map Shader - flow map shader working with sprites
• VertexPaint - additional vertex streams
• ShaderProject - shader collection
• Skybox Plus - a collection of skybox shaders
• Outline Shader - outline shader which accomodates screen width and camera distance
• Unity Sprite Uber Shader - 3D shading for sprites (e.g. normal mapping)
• Low Poly Shaders - material shaders optimized for Low Poly stylized meshes
• Lux Shader Framework - Lux 2.02 pbr Shader Framework
• Unity Wireframe Shaders - general purpose wireframe shaders
• Hologram Shader - simple hologram shader
• Kamakura Shaders - a collection of shaders and components focusing on Non-Photorealistic Rendering
• Facepunch.Highlight - Mesh outline effect

2D

• UnitySVG - svg renderer
• UnityStbEasyFont - text mesh generator
• SpriteLightKit - 2d sprite lights
• 2D Light of Sight Unity - 2d flat geometric lightning
• Unity Sprite Uber Shader - 3D shading for sprites (e.g. normal mapping)
• Fungus - 2d interactive storytelling game framework
• PolyMesh - 2d shape editor
• Unity Tilemap - 2D tilemap editor
• 2D Extras - reusable 2d scripts (tilemaps, etc.)
• Vector Graphics Samples - samples of the Vector Graphics features to be used with Unity 2018.1 and newe

Networking

• UNet Authoritative Networking - authoritative networking implementation
• MLAPI An alternative to Unity's UNET high level API, allows for separate server/client projects and more
• Barebones Master Server - Host your own custom master server setup, avoid CCU fees

VR

• SteamVR - VR SDK
• The Lab Renderer - VR renderer by Valve
• VRTK - contains useful scripts for building VR games
• NewtonVR - VR physics and interactions
• Cutie Keys - VR keyboard
• Punchkeyboard - Another VR keyboard
• Hover UI Kit - a complete VR input framework
• VRLineRenderer - glowing lines renderer optimized for VR

Sound & Music

• usfxr - procedual audio effects
• Reaktion - audio reaction toolkit (mac only)
• DefaultMicrophone - gets the default microphone (windows only)
• Lasp - Low-latency Audio Signal Processing plugin for Unity

UI

• Unity UI Extensions - collection of ui extensions
• Book Page Curl - page curl transition
• Open Pause Menu - read-to-use pause menu
• Lunar Mobile Console - debug console for mobiles
• InfinityScroll - infinite scrollrects
• TextMesh Pro - generate text with custom styling
• EasyButtons - create buttons in the inspector using annotations
• UI Extensions - various NGUI extensions/helper/scripts
• NGUI Extensions - a few NGUI extensions
• Webview CSharp - render websites
• Typogenic - an easy to use, fast and high-quality 3D text renderer

Post-Processing & Rendering

• kode80SSR - screen-space reflections
• KinoObscurance - screen-space ambient obscurance
• SMAA - subpixel morphological anti-aliasing
• Temporal Reprojection Anti-Aliasing - anti-aliasing solution used in INSIDE
• kode80CloudsUnity3D - realtime volumetric clouds
• PixelRenderUnity3D - pixelized rendering
• PixelCamera2D - pixel-perfect rendering
• KinoMotion - motion blur using motion vectors
• KinoContour - edge detection
• KinoMirror - kaleidoscope effect
• KinoFringe - chromatic aberration
• KinoBinary - 1-bit monochrome effect
• KinoFeedback - retro framebuffer feedback effect
• KinoRamp - color ramp overlay
• KinoSlitscan - slit-scan effect
• KinoGlitch - glitch effect
• KinoDatamosh - datamosh
• unity vhsglitch - vhs glitch effect
• Scanline Shader - scanline effect
• KinoFog - global fog
• KinoBloom - bloom
• KinoBokeh - bokeh effect
• KinoVignette - vignette
• KinoVision - frame information visualizer
• Unity5Effects - post-processing collection
• LightShafts - light shafts
• VolumetricLights - volumetric lights
• SonarFx - wave patterns
• Cinematic Image Effects - cinematic image effects
• Post-processing Stack - multiple image effects in one pipeline
• Moments - gif recorder
• uDesktopDuplication - realtime screen capture as Texture2D
• Heat Distortion Effect - a shader which distorts the image behind, using a normal map
• Clear Flags Effect - Image Effect to reproduce the Clear Flags camera effect
• DeLightingTool - tool to remove lighting information from textures in a photogrammetry asset pipeline
• unity-lut-generator - LookUpTable generator for Unity
• SEGI - Sonic Ether's voxel-based global illumination system
• Aura - a local simulation of the light scattering into the surrounding medium

Mobile

• Toast - android toast notifications
• FBSucks - android share image & text
• UnityShowAndroidStatusBar - android show statusbar
• Google VR SDK - google mobile vr sdk
• Unity Webview - webview overlay
• CUDLR - remote debugging and logging console
• Simplygon - mesh optimization & lod generation

Debug

• uREPL - runtime evaluation of c# expressions
• UberLogger - advanced logging API, improved editor console & ingame console
• Unity File Debug - enhanced Debug.Log with file export and web viewer
• Immediate Window -- Type code and get immediate feedback with object inspection like chrome console debugger.

Editor

Tools

• REX Diagnostics - runtime evaluation of c# expressions
• Better Defines - platform dependent preprocessor directive manager
• MissingReferencesUnity - find missing references
• Unity Resource Checker - resource analyzer
• Compile Time Tracker - compile time tracker
• UnityStudio - unity asset export tool
• Screen Shooter - takes screenshots with multiple resolutions at once
• Script Templates for Unity - script templates
• Unity 2D Destruction - sprite destruction
• CurveTexture - bake curves into texture
• Unity3D Rainbow Folders - folder icons
• Unity Themes - editor themes
• Tree Randomizer - randomize unity trees
• Render Settings Duplicator - clones the render settings from one scene to another
• Piviot Transform Helper - adds piviot creation shortcuts to the context menu
• ScriptExecutionOrder Attribute - attribute to specify execution order
• Simple Editor Shortcuts Tools Collection - small collection of simple tools to help in scene editing workflows
• Mulligan Renamer - bulk renaming tool for game objects and assets

Unity C# Script Editor

Editors

• Brainiac - behaviour tree & (behaviour-)node-based visual editor
• Node Editor - (calculation-)node editor
• BrotherhoodOfNode - (more graphical-)node editor for visual things
• VisualNoiseDesigner - visual noise designer
• SimpleGeo - simple geometry painter
• Curves and Splines - curve & spline editor
• Unity 2D Joint Editors - 2d joint editors
• PolyMesh - 2d shape editor
• VertexPaint - vertex data painter
• SabreCSG - a set of level design tools for building complex levels
• Constants Generator Kit - generates static classes for layers, scenes, tags and resources
• Unity Tilemap - 2D tilemap editor
• Node Editor Framework - Node Editor Framework for creating node based displays and editors
• Unity Event Visualizer - graph editor for viewing all UnityEvents

Inspector Extensions

• Reorderable Lists - reorderable list field
• Ordered Dictionary - ordered dictionary field
• ClassTypeReference - class type reference field
• Unity3D ExtendedEvent - extended event selector
• Property Drawer Collection - collection of property drawers
• Node Inspector - node based inspector
• ColorBands - color bands
• QuickEvent - persistent event handlers with static or dynamic values
• Reorder Components - reorder components on your GameObjects
• AwesomeComponent - auto load assets on SerializedFields
• ScenePreview Inspector - view scene preview in inspector

Importer

• Unity Excel Importer Maker - excel
• Unity Psd Importer - advanced psd import

Serialization & Web

• Full Serializer - custom serializer
• Json.Net - Newtonsoft Json.NET
• SQLite4Unity3d - sql lite
• UnityHTTP - http library
• Unity QuickSheet - import data from google/excel sheets
• Odin Unity Serializer - Arguably the best serializer for Unity out there

Social SDKs

• Google Analytics Plugin - Google Analytics
• Google Play Games Plugin - Google Play plugin
• Facebook SDK - Facebook sdk
• Reign Unity Plugin - unified mobile api
• GetSocial SDK - community api
• SOOMLA Framework - store api
• Steamworks.NET - c# wrapper for valve's Steamworks API
• Facepunch.Steamworks - Steamworks C# API (not all features implemented, but better API)
• twitter-for-unity - Twitter API Client for Unity

API Extensions & Helper

• Camera Extension - a better way of manipulating the culling mask
• Download Manager - simple file downloads
• UnityMainThreadDispatcher - main thread dispatcher
• UnityBitmapDrawing - texture2d drawing extensions
• Unity3D ComponentAttribute - auto component referencing
• Unity3D ExecutionOrderAttribute - execution order attribute
• LINQ to GameObject for Unity - gameobject linq querys
• Chained Works - coroutine chained procedures
• TeaTime - timer queue for coroutines
• Smart Tags and Layers - generates static values for your tags and layers
• UnityRefChecker - A plugin for checking unassigned references in MonoBehaviours at compile time, across scenes.
• xNode - easily create node-based plugins

Design Patterns

• Unity Singleton MonoBehaviour - powerful singleton
• Signals - simple event/signal system
• Unity3d Finite State Machine - simple finite stata machine
• stateless - more complex state machines
• Design Patterns in Unity Example - collection of design patterns
• Entitas CSharp - entity component system framework
• strangeioc - inversion of control framework
• Zenject - depedency injection framework
• UniRx - unity reactive extensions implementation
• Ring_Buffer - simple implementation of a RingBuffer

Utilities

• demilib - various utilities and tools for Unity
• Excessives - General purpose C# and Unity3D utility scripts

Other

• Unity Right Click - windows context menu extension: 'open with unity'
• No Hot-Reload - prevent unity hot-reloads
• Unity C# 5.0 and 6.0 Integration - c# 5 & 6 integration for unity
• FLUnity - flash to unity
• Projeny - project management
• CUDLR - remote debugging and logging console
• WebGL - Simple Loading Fix - custom loading bar for the webgl loader
• UtilityKit - SerializationUtil, SpriteAnimator, SpriteAnimator, MathHeloers, AutoSnap, ...
• Remove Boo.Lang and UnityScript Hints - Project Generation Hook to remove references to Boo.Lang and UnityScript assemblies
• Asset Store Batch Mode - API for uploading Unity Asset Store packages
• Unity Size Explorer - analyzes the disk space usage of your build
• Better Unity Script Templates - improved Script templates
• UnityCsReference - Unity C# reference source code
• Shader Calibration Charts - Unity StandardShader calibration charts
• Save Game Free - cross platform, encrypted, online-stored saves
• UCompile - Runtime compilation and execution of CSharp code
• UDBase - module-based game template for Unity
• Hull-Delaunay-Voronoi - Hull, Delaunay and Voronoi algorithms in Unity