Find Objects:

This addon allows you to select all objects that are from the same type just by pressing "F".

Selecting one object and pressing F finds and selects all the objects that are from the same type. It works for all types of objects (mesh, curve, empty, lights, cameras, armatures and etc.). Alternately it can be used from the N-panel > Tool menu > Find Similar button.

To use the addon you can:

• Install it like every other addon by going to Edit > Preferences > Addons > Install
• Enable the addon and there should be a menu in the N-panel > Item menu called Find Objects
• Select a object in the scene and press "F"

Sort Objects:

This is a Blender addon that allows you to sort all your objects by face count, material type or by type of object (mesh, curve, empty, lights, cameras and etc.)

To use the addon you can:

• Install it like every other addon by going to Edit > Preferences > Addons > Install
• Enable the addon and look for the menu in the N-panel > Item menu
• Make sure you turn off Sort Alphabetically from the filter menu on the top right corner of the screen
• Select a collection with objects and sort the objects in it by your preferred method. 

You can check out my other very useful Blender addons:

Blender LUTs

Clean Addons

PIC to 3D Mesh

Enable / Disable In Render     

Render Selected Cameras              

Easy Transfer