Full documentation located here:

Installation and Usage

1. Edit > Preferences > Extensions tab.
2. Click the arrow icon in the upper right corner of the preferences window.
3. Select 'Install from Disk', locate and select the “cramo_tools_xxx.zip file.
4. It should now be enabled and in the extensions list. If not, check the box next to its name.
5. Click 'Save Preferences' in the lower-left corner, or enable 'Auto-Save Preferences'.
6. Close the preferences window or edit the preferences by selecting the Add-ons tab.

Usage: While hovering over a 3D viewport, Press F1 for the Cramo Tools menu. From there, select any of the following buttons. Hotkey can be changed in the preferences menu.