This plugin allows you to quickly open a texture, 3d model or audio file by simply right-clicking in the asset window and choosing "Open With YourProgram". This plugin is similar to Firefox "Open With Photoshop" add-on but it supports more programs.
List of suported programs:
Photoshop, Gimp, Paint
Maya, Cinema4d, Blender, 3dsMax
Audacity
You can watch a short tutorial here:
https://youtu.be/QXPmLwadFAI