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WinCompose - WinCompose supports the standard Compose file format.
BabelMap - Unicode Character Map for Windows
SymbSearch - A tool for searching unicode-symbols and copying it to the clipboard.
PopChar - It has never been easier to find and insert special characters.
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.
JapaneseEmoticons.me - List of over 10,000 kaomoji (text or ascii) emoticons