https://blendermarket.com/products/camswitch

Cam Switch is an artist-friendly solution for Blender users who want to work with multiple cameras in a more efficient and organized way. With Cam Switch, you can easily access all of your cameras right in the 3D viewport, making your workflow faster and more streamlined.  Cam Switch's popover panel allows you to quickly select, rename, and delete cameras. With different icons, it's easy to see which camera is active and which one is selected. Plus, with the ability to assign a custom shortcut, you can access the camera list panel without ever leaving your keyboard.