Or Firefox Hello: https://www.mozilla.org/en-US/firefox/hello/

And Microsoft Hello: http://blogs.windows.com/bloggingwindows/2015/03/17/making-w...

Guess that's the downside of using a product name that isn't trademark-able...

Nor the mother of all Hello apps:

https://www.gnu.org/software/hello/

(As of version 2 it includes a mail reader...)