Ñ
Ñ is a Latin-script letter used in some languages. The little bit on top is called a tilde. It is used, for example, in Spanish.
Spanish
In Spanish, Ñ represents the IPA sound /ɲ/, which approximately sounds like ny, some examples of usage are piñata (pinyata), jalapeño (jalapenyo), and español (espanyol).
Crimean Tatar
In Crimean Tatar, it represents the IPA sound /ŋ/, which approximately sounds like ng. This usage is also used in Nauruan