PopChar - The character map that works!
Shapecatcher - You need to find a specific Unicode character? With Shapecatcher.com you can search through a database of characters by simply drawing your character into a box. It can find the most similar character shapes for your drawing.
BabelMap - Unicode Character Map for Windows
Character Map UWP - Third Party Windows Character Map in UWP, this is a workaround for Win32 Character Map not supporting High DPI screens. I've also added couple ...
WinCompose - WinCompose supports the standard Compose file format.
UnicodeChecker - Mac OS X application to explore Unicode.