PuTTY - Popular free terminal application. Mostly used as an SSH client.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
iTerm2 - A terminal emulator for macOS that does amazing things.
Superputty - The SuperPuTTY Window Manager for putty sessions. Contribute to superputty development by creating an account on GitHub.
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
mRemoteNG - mRemoteNG is a fork of mRemote, an open source, tabbed, multi-protocol, remote connections manager.