Hello everyone, Alex here
I created a handy little script that allows you to visually represent the colliders in your scene. For every collider, you can display the faces and the edges with a unique color. You can choose to only show the edges, only show the faces or both. There is an option to show the center of the collider as a smile dot or cube, with a unique color and again for that center point you have control over the faces, edges and their colors.
The script currently supports Box and Sphere colliders both in 3D and 2D.
The gizmos work correctly with all positions, rotations and scales!
Some visuals
I am using this tool in a project I’m currently working on which is a Door tool, check it out 
Here are some visuals from that project where I use the gizmo tool:
Feel free to reply with questions or feedback! If you have any feature requests, let me know!
Even though the asset is still a work in progress, I’m going to release a beta version on the asset store this week for a small price.
Alex
