Top Alternatives to FireSSH

PuTTY is a free SSH client.

KiTTY is an implementation of Telnet and SSH for Win32 platforms.

mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.

MobaXterm is a free X server for Windows with tabbed SSH terminal, telnet, RDP, VNC, Xdmcp, Mosh and X11-forwarding.

Terminator is a terminal emulator released under General Public License and is available for GNU/Linux Platform.

ConnectBot is an open source Secure Shell client for the Android operating system.

ZOC is a modern terminal emulator for Windows and macOS.

Bitvise SSH Server and Client for Windows.

Remote Desktop Manager is a remote connection and password management platform.

Konsole is a free and open-source terminal emulator which is part of KDE Applications.

Xshell is a powerful terminal emulator that supports SSH, SFTP, TELNET, RLOGIN and SERIAL.

PAC is a SecureCRT/Putty/etc (connections manager with automations) equivalent for the Linux world.

Manage your PuTTY sessions from the tray with freeware stand-alone app.

SecureCRT is an SSH and Telnet client and terminal emulator.

Royal TS is a simple, yet powerful tool for administrators, developers, system engineers and many other IT focused information workers that supports them in working effortless with their remote systems or management consoles.

Chrome Secure Shell is a xterm-compatible terminal emulator and stand-alone ssh client for Chrome.

ConsoleZ is a modified version of Console 2 for a better experience under Windows Vista/7/8/10 and a better visual rendering.

LXTerminal is the standard terminal emulator of LXDE.

JuiceSSH is a free SSH client for Android.

ASG-Remote Desktop integrates a large variety of connection protocols, allowing you to manage Windows, Citrix, Linux/UNIX- and Macintosh systems remotely.

Hyper is a terminal emulation program capable of connecting to systems through the internet via Telnet or SSH, by Dial-Up Modem, or directly connected by a RS232 serial cable and COM port.