My personal choice: Talend API Tester - Free Edition (formerly called 'Restlet').
It's straightforward, and (most importantly for me) works seamlessly through a corporate proxy. I also like it's approach for having a hierarchical tree of saved queries, which can be easily exported and traded between developers (I'm sure there are superior, centralised solutions but this works well in our team).
I read this and thought you were referring to Neil Postman.
I've read some of his books - Amusing ourselves to death and Technopoly - which I would recommend to anyone.
The first is regarding the effect different mediums of communication have on the messages we transmit in them. How do the messages you transmit with say smoke-signal, writing and tv differ?
The second talks about technology for technology sake, rather than a means to an end. Increasingly relevant today.
I use Curl exclusively. As far as command-line interfaces go, it's not that bad. Some of the command-line arguments are a lie though, and do less or more than they claim. So my trick is, I just copy-paste a big multi-line Curl command from my notes every time, and edit it as needed.
Same here. Curl works wonderfully. Takes time to build your scripts but they pay off in spades. We dump all this in a git repo. Much easier to diff and reason about than postman environment.json and collection.json files (and maintaining a compatibility matrix).