For me, that would be Secure CRT. I have yet to find a terminal emulator that matches its feature set. If you regularly manage hundreds of machines using various connection protocols (serial and ssh mostly in my case) It’s worth the $$$, and so far there hasn’t been any subscription nonsense. I liked using it at work so much I forked over the dough to have it at home.
None of the free alternatives do everything I need.
I’ll also mention a few iOS apps. One is Sun Surveyor. It’s an AR app that shows you the position of the sun, moon, and galactic center at any given time. The other would have to be Radarscope. It’s a weather radar app, but it’s a really good weather radar app.
EDIT:
This one’s debatable, but I use it all the time. Plasticity is 3D modelling software that attempts to bridge the gap between practical CAD programs and software meant for 3D artists like Blender. It’s not cheap considering Blender is free, but it’s buy once use forever, and at (I think) $150 it’s within reach of an individual hobbyist who knows what they want and is willing to pay for it.


The list is literally endless, and more often than not specific to what you specifically need. Here are some things I have setup:
I have also used it previously for job specific tasks. Like I had a button on my home screen that would open a menu with a list of options, and then I would select one of the options. It just saved that selected text and the current time into a file so I could reference what time I did something.
If you have any sort of smart home, the options just keep growing.
I do have a smart home and spend way too much time playing around with it, but haven’t done much with Tasker yet. The only thing I use it for right now BT presence detection to trigger a task enabling wifi and disabling location.
Interesting and useful info, thanks for sharing.