For Windows users: mobaxterm "putty on steroids"

For those who use Windows as their primary workstation and have to use putty and other things http://mobaxterm.mobatek.net/ is the swiss army knife for almost anything that putty does plus other things.

There are many pieces of gold to be picked after a one click installation or portable non-installation.

There is a nice gif that shows some of what it does on the home page: in relation to Espruino, play and learn.

Nice - neat that it has an X server too (not that it's useful for Espruino!).

Hmmm, X client on Espruino ... Nope: keep it html5 :)

If we're talking about very feature rich terminal programs - for physical serial ports, I use hTerm. It has a bit of a learning curve, but it lets you do almost anything you could imagine doing to a serial port.

I never use PuTTY except for connecting over the internet; I realize some people use it for local serial, but the featureset seems to be terribly sparse for that...

http://www.der-hammer.info/terminal/

• for Windows and Linux - yep: it has what it takes for hard core.
  
  

Runs without installation, and even looks good for it's age on Windows 10.

A program to have in one's tool box I think: Thanks DrAzzy.