I'd be very excited to see more Free Software instant messaging applications support OMEMO (http://conversations.im/omemo/). It's basically TextSecure's Axolotl protocol with a few slight modifications. As such, it support multi-party OTR-like PFS and multiple devices. In contrast to TextSecure, Conversations (the first client to implement it) allows you to use it without having to install Google Play Services and makes it usable on a decentralized infrastructure (XMPP). If it became standard for Open Source messaging clients (whatever transport they use) to have Omemo built in and use it opportunistically, we might actually have a chance to provide usable crypto to the masses.