I couldn't find any simple, quick translators for the NATO Phonetic Alphabet (you know, "Alpha! Bravo! Charlie!"), so I wrote nato-alpha.appspot.com last night. (Yes, I tried alphabravocharlie.appspot.com, but it was taken.)
You can use the form, or you can use nice short URLs like nato-alpha.appspot.com/test.
It's not fancy, but it appears to mostly work. It's as much an excuse to learn Go on AppEngine and use a little Bootstrap 3 as it is an actual webapp. Code is on GitHub.