WinCompose - WinCompose supports the standard Compose file format.
AMP Font Viewer - Jump to Download - Download.
PopChar - The character map that works!
Font Viewer - Font Viewer is an application which does exactly that - it views fonts!
AllChars - If you're new to AllChars: start with the Introduction, see the FAQ and Manual. And finally download it. AllChars is now Open Source, usage is free and the sourcecode is available.
What Font Is - Find any font from any image (commercial or free)