PopChar - The character map that works!
Unicode Chars Number - Find the ordinal value (numeric character code) of any Unicode character!
WinCompose - WinCompose supports the standard Compose file format.
UnicodeInput - It allows a user to insert unicode characters by their corresponding unicode hex value
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.
Holdkey - Holdkey is a Windows program that makes it easy to type characters with accents..