[schoen]

I think the part of the speech quoted by the parent commenter was indeed referring to exactly this software, and to the other things that the speech mentions:

"I have in my pocket a cryptographic telephone [...] This phone, short of breaking into it when I make a phone call, no one here, short of a mathematical breakthrough, is going to be able to intercept it. I have a couple different encrypted text messaging services. I have the TOR project, Orbot, Progra, Cryptophone, Redphone, TextSecure."

In context, the "cryptographic telephone" is a smartphone running all of this software. "Progra" is a mistranscription; I just listened to the original and he says "the Tor Project's Orbot program".

[dthunt]

I would be shocked if Appelbaum is still using a standard cell-phone at this point. There's just too much reason to worry about remote compromise of the device.