PopChar - The character map that works!
Oh My Glyph - View the glyphs and swashes from the PUA (private use area) of TTF & OTF font files with ease with our browser app - nothing to install!
font-viewer.com - A browser-based font viewer.
Font Viewer - Font Viewer is an application which does exactly that - it views fonts!
Typetester - Typetester is an online tool for designing with web fonts.
Event Viewer - Get help, support, and tutorials for Windows products—Windows 10, Windows 8.1, Windows 7, and Windows 10 Mobile.