Final Term is described as 'new breed of terminal emulator. It goes beyond mere emulation and understands what is happening inside the shell it is hosting' and is a Terminal Emulator in the OS & Utilities category. There are more than 10 alternatives to Final Term for Linux, BSD, Mac, Windows and Xfce. The best alternative is Terminator, which is both free and Open Source. Other great apps like Final Term are iTerm2 (Free, Open Source), GNOME Terminal (Free, Open Source), Guake terminal (Free, Open Source) and Yakuake (Free, Open Source).
Terminator enables the user to run and manage multiple terminal emulators side-by-side in the same window. The main focus is arranging terminals in a grid. (Tabs is the most common default method, which Terminator also supports.
iTerm2 is a replacement for Terminal and the successor to iTerm. It works on Macs with macOS 10.10 or newer. iTerm2 brings the terminal into the modern age with features you never knew you always wanted.
GNOME Terminal is a terminal emulator for the GNOME desktop environment written by Havoc Pennington and others. Terminal emulators allow users to execute commands using a real UNIX shell while remaining on their graphical desktop.
Guake is a top-down terminal for Gnome (in the style of Yakuake for KDE, Tilda or the terminal used in Quake). Guake is already package by a number of distribution (among them are Fedora, Debian, Ubuntu or ArchLinux).
Guake terminal vs Final Term opinions
pros, cons and recent comments
It's just one of many 'drop-down' style terminals that seem to be popular. It in no way has the same innovative thinking that finalterm has/had.
Yakuake is a drop-down (Quake-style) terminal emulator based on KDE Konsole technology. Its design was inspired from consoles in computer games such as Quake which slide down from the top of the screen when a key is pressed, and slide back up when the key is pressed again.
Tilda is a Linux terminal taking after the likeness of many classic terminals from first person shooter games, Quake, Doom and Half-Life to name a few, where the terminal has no border and is hidden from the desktop till a key or keys is hit.