WinCompose provides a robust compose key for Windows.
It allows to easily write characters such as é ž à ō û ø ☺ ¤ ∅ « ♯ ⸘ Ⓚ ㊷ ♪ ♬ using short and often very intuitive key combinations. For instance, ö is obtained using o and ", and ♥ is obtained using < and 3.
These details are provided for information only. No information here is legal advice and should not be used as such.