A maintained collection of useful & free unity scripts / library's / plugins and extensions.

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 Please report broken links, outdated assets and spelling mistakes.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:

• GameObjects & Transforms
• Movement & Animation
• Controls & Input
• Character Controller
• AI & Pathfinding
• Physics
• Particles
• Meshes & Construction
• Materials & Shading
• 2D
• Networking
• VR
• Sound & Music
• UI
• Post-Processing & Rendering
• Mobile
• Debug
• Editor
  • Tools
  • Editors
  • Inspector Extensions
  • Importer
• Serialization & Web
• Social SDKs
• API Extensions & Helper
• Design Patterns
• Other

• RecyclerKit - pooling system
• UnityOctree - octrees
• In-Game Replay System - record and replay transforms

• 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

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

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

• A Star Pathfinding for Platformers - A* for platformers
• AStart - basic A* pathfinding
• Astar for Unity - A* pathfinding
• A* Pathfinding Project - A* pathfinding
• UnitySteer - steering, obstacle avoidance and path following behaviors

• Mario Galaxy Gravity for Unity - mario galaxy gravity
• Ocean Community Next Gen - water physics/shader
• Voxel GPU Physics - GPU accelerated voxel physics

• KvantSpray - gpu accelerated particles
• NVIDIA Hair Works Integration - Nvidia hair works
• Ember Particles - turbulent ember particles

• 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

• 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

• 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

• UNet Authoritative Networking - authoritative networking implementation

• 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

• usfxr - procedual audio effects
• Reaktion - audio reaction toolkit (mac only)
• DefaultMicrophone - gets the default microphone (windows only)

• 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

• 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

• 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

• uREPL - runtime evaluation of c# expressions
• UberLogger - advanced logging API, improved editor console & ingame console

• REX Diagnostics - runtime evaluation of c# expressions
• Better Defines - platform dependent preprocessor directive manager
• Unity File Debug - enhanced logging
• 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

• 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

• 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

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

• Full Serializer - custom serializer
• Json.Net - Newtonsoft Json.NET
• SQLite4Unity3d - sql lite
• UnityHTTP - http library
• Unity QuickSheet - import data from google/excel sheets

• 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)

• 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

• 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

• 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 g
• Better Unity Script Templates - improved Script templates
• UnityDecompiled - decompiled Unity API code
• Shader Calibration Charts - Unity StandardShader calibration charts