No features have been listed yet.
WinCompose - WinCompose supports the standard Compose file format.
GNOME Characters - Character map application
BabelMap - Unicode Character Map for Windows
PopChar - It has never been easier to find and insert special characters.
SymbSearch - A tool for searching unicode-symbols and copying it to the clipboard.
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.