Download Highlighting System FREE Unity. 

Highlighting System package allows you to easily integrate outline glow effect for objects highlighting in your Unity project.

Main features:
• Works as an Image Effect on Camera
• Compatible with Forwarding and Deferred rendering paths, HDR, Gamma, and Linear Color Space, GPU Instancing
• Original renderer materials remain intact (shared materials will remain shared)
• VR: Compatible with Single Pass (Fast) Stereo Rendering Method
• Fully compatible with LODGroup component
• Works with static and skinned meshes

Three highlighting modes available:
1. Hover
Useful for highlighting objects under the mouse cursor.

2. Tween
Useful to pay attention to a specific object (e.g. tutorial item).