A very useful Windows application that lets you type or paste a line of characters and it displays the individual code points with Unicode values, and then lists all of the fonts on your system that contain those characters, and percentage of coverage if they only contain some of the characters. You can switch to any of those fonts by clicking on the font.

Screenshot of Character Identifier Tool

When you close the window, the program stays in the background with a task-tray icon for easy access.

The program "installs” simply by copying the exe file to wherever you want it.