I just wanted to recommend ZOC (Which may some people still know from the good old Amiga times). It's available for Windows and MacOS. ZOC does have some really incredible features (integrated file transfer, multi-execution, team-directories). It's similar prices as MobaXterm, but doesn't have XWindows support.
If you don't need X-Window support, but rich terminal/ssh features, it may be a ($70) try.
It's definitely very good and has a lot to offer, but I still can't justify $70 for some reason. The free version offers enough functionality to be a very good PuTTY alternative though.
I was about to, until I read the fine print and realized it's $70 to buy, but you'll only get updates for a year; after that you buy again or stick with your current version - no bug fixes. Were there a more reasonable price for non-commercial use, I would have no problem buying sooner.
On the other hand, its has the only windows Mosh implementation...the best thing since sliced bread and tmux!
If you don't need X-Window support, but rich terminal/ssh features, it may be a ($70) try.
https://www.emtec.com/zoc/index.html