WinCompose - WinCompose supports the standard Compose file format.
BabelMap - Unicode Character Map for Windows
PopChar - The character map that works!
Gucharmap - Open source character map for the GNOME desktop environment.
Unicode-Table.com - All Unicode Symbols with Names and Descriptions on One Page: ❤ ☀ ★ ☂ ☻ ♞ ☯ ☭ ☢ € → ☎ ❄ ♫ ✂ ▶ ✇ ♎ ⇧ ☮ ♻ ⌘ ⌛ ☘ ✈ ✔ ☊ ♔ ♕ ♖ ☦ ✝ ❖ ➎ ♠ ♣ ♥ ♦ ♂ ♀ ❂ ❃ ✒
SymbSearch - A tool for searching unicode-symbols and copying it to the clipboard.