A maintained collection of useful & free unity scripts / libraries / 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 Please report broken links, outdated assets and spelling mistakes.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
• Unity Scene Query - library to traverse and query the Unity scene to find particular objects

• 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
• 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
• SPHFluid - Interactive 3D Fluid Simulation based on SPH

• 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.

• 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

• 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.)

• 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)
• Lasp - Low-latency Audio Signal Processing plugin for Unity

• 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 CSh