tmate : Tmate is a fork of tmux. It provides an instant pairing / sharing solution for the terminal.
Asciinema : Asciinema is a free and open source solution for recording the terminal sessions and sharing them on the web.
warp : Secure and simple terminal sharing
warp lets you securely share your terminal with one simple command: warp open. When connected to your warp, clients...
TailTub : Pipe your app and server logs to TailTub. You get back a unique URL. Share the URL with others to view results in real-time.
GateOne : Gate One is an HTML5-powered terminal emulator and SSH client
ASCII.IO is the simplest way to record your terminal and share the recordings with your fellow geeks. Simply record and upload your terminal session with a single command, and ASCII.IO will play it back in your browser.