Signal Desktop beta now publicly available
I just wish Signal was easier to get through a firewall."You need to open TCP 31337 and all UDP ports in order for Signal to work." 
Emphasis mine.http://support.whispersystems.org/hc/en-us/articles/21369721...When I first read that I was sure that must largely apply to the calling (voip) features, but testing showed me I was wrong. I couldn't even make messaging work through a firewall so now I sourly use Telegram instead (no private chats by default in telegram??).