This addon let you to change object's origin to selected.

・How to use

• Select mesh object
• Go to Edit mode
• Select any vertex/edge/face you want to move origin to.
• Press Shift+Q
• If you turn on "Auto Clear Location" in preferences, object will move to world origin by object's new origin.

You can change shortcut in preferences.

・Installation

• download zip file.

• Go to Blender’s user preference, open the Add-ons tab

• click Install and select the zip file.

• check the box next to its name to enable it.