Option to show number of files in folder or count files and folders in a project?

I would like to be able to count number of files and folders in selected directory/project and maybe even have the option to display the count next to the folder name, something like:

or maybe to have it work on mouse over event, or: right click -> file/directory count?

I often simply depend on the ability to see how many files are in a folder so I either have to count them manually or have to open the terminal to check this information out.