PuTTY - Popular free terminal application. Mostly used as an SSH client.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
iTerm2 - A terminal emulator for macOS that does amazing things.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.