This page http://www.typeit.org/ allows you to easily type the characters of different languages without a specific keyboard. You can edit your text in the box and then copy it to your document, e-mail message, etc.
Handy keyboard shortcuts that take zero time to learn
Switch between character sets while typing
Choose boldface, italics, font face and other formatting
Your text is automatically saved in case you exit by accident (in Firefox/Chrome)