Surprised to see only one mention that I could catch (by
@mdc) for the miniware and adjacent irons. I bought my first because I was limited on workspace but I'd still be hard pressed to buy something else.
I used a TS100 for a couple of years before I botched the shell trying to fix a purely cosmetic issue. I've been using a
pine64 pinecil since - they fixed everything that wasn't perfect about the TS100 - buttons are better placed, has a flat edge on one side so it doesn't roll, etc. Replacement shells are easy to get still (difficult with the ts100 by the time I had wanted one).
I also have a FNIRSI T12 one that's similar (
amazon link, can be found for $30 on Ali) but haven't used it much. There's another Ali iron that takes TS100 style tips and T12 in one body that I picked up and was impressed with. I've been taking my non daily to work for repairing random crap and being able to transport them in a portable hard drive case is awesome. For PCB work they're great, come to temperature very fast with an old laptop charger or decent enough USB-C charger, and they're teeny tiny to boot.