Any free online C# editors with code completion?

Hello, I am looking for an online IDE for C#. I have come across many IDEs that have claimed to 'support' C#, but in reality only offer syntax highlighting. Compilr (compilr.com) looked promising, but it requires a subscription. I found .NET Fiddle (dotnetfiddle.net), but it seems very limited (you can't compile multiple files at a time, for example) and you can't download files/push to Github. Finally, I came across Chpokk at chpokk.apphb.com (which at first looked really promising), but even though it says it has "Intellisense", when I try typing something like 'Console.' nothing shows up (was I doing something wrong?).

So in summary, does anyone know of an online, C# IDE that offers:

• code completion


• some way to save files outside of the website (downloading, pushing to Github)


• its services for free (or at least, a one-time payment)
  

(I don't even need it to run the code, as long as I can download it somehow.)

Thanks!