I know of PuTTY, but let's face it, PuTTY looks bad. Macs have some beautiful SSH clients. What about Windows? Anything stylish and modern?
Beauty is in the eye of the beholder, but ZOC Terminal should definitely be on your list.
It's not free, but chock-full of features and definitely good looking, as can be seen here.
What is beautiful? Functionality or looks?
And is the emulator (wrapper) you want to look good, or the shell/environment? In most cases the environment can look great by just switching to a Powerline font variant and a customized framework (Oh-My-Zsh, anyone?)
Here are a few of the terminal emulators I use on Windows.
Hyper.is is one of the nicest looking on windows, due to both its flexibility and customization.
Combined with ZSH (oh-my-zsh), a powerline font, a theme and some plugins, it's one of the nicer looking terminals. It's a wrapper so you can use an environment of your choice (WSL, Cygwin, msys2, Git Bash, etc). In my screenshot, I have it running in my Babun/Cygwin environment with the Material theme. Check out Awesome-Hyper to get it just the way you like.
Babun / Mintty
Babun is a built-for-Windows shell including must of what you need in a nice package. It's default terminal emulator is Mintty in the cygwin environment. What makes mintty nice is it's customization but a minimal approach.
XShell 6 (beta) is shaping up nicely, although a paid solution. Mentioned for it's functionality, rather than customization.
RoyalTS is a major all-in-one tool and has everything from RDP, SSH, VNC, Telnet, etc. The free version is limited to loading a document with 10 connections; More than enough for the average user, plus you can just make multiple documents and switch between them.
WinSSHTerm, as mentioned above. Has a nice 'clean' interface with a nice layout.
Bitvise SSH Client looks a bit more appealing than PuTTY - I used to use PuTTY but switched to this because of the interface, but as the comments say, what do you think "beautiful" is?
This is Bitvise SSH Client:
As you can see, it looks slightly better than PuTTY, almost like Fugu for Mac - you might have seen it around.
It's free for individual use - hope you like it!
In case you are thinking about the terminal color and font, then yes the standard settings in PuTTY are not optimal - especially if you need to work with it 8 hours a day.
In WinSSHTerm, which is a wrapper for PuTTY, these settings are optimized for readability.
Cyberduck is a free and open-source FTP, SFTP, WebDAV, S3 & OpenStack Swift file browser for Mac and Windows.
Note that this is only a file browser, if you're looking for a terminal there's no such thing as a "beautiful" terminal, but you can still try PuTTYTray which adds some good-looking features like transparency and support for changing the taskbar icon of the terminal window, and you can use a custom color scheme, I personally use GDvalle's Monokai theme (compatible with both PuTTYTray and the original PuTTY, just save the Gist as a
.reg file and open it).
Here's what PuTTYTray looks like on my machine with the Monokai theme, cleartype font, transparency and a custom icon :
PowerShell team from Microsoft ported OpenSSH to Windows. It doesn't provide a graphic user interface but that's advantage to me, because I have been running PowerShell within ConEmu for long. This is a screenshot from ConEmu website:
Coming from Linux, I always like the idea of separating Virtual Terminal (like iTerm2 in macOS) from Shell and Application (like Bash and SSH), because I typically want to configure them independently. "Tabs within window" is obviously the job of a terminal, so it is weird to ask SSH client to do that.
One of my favorite ssh clients is Termius, previously known as Serverauditor. It's very beautiful and works very good in smartphones too.
Termius is the #1 cross-platform terminal with built-in SSH and Telnet. It is the portable server management system that works for you in any situation.