OK, so this has been mentioned on this site before, but I only just found out about it and I imagine a lot of others won't have heard of it either.
Here's a programming language not supported by the Arduino IDE, but you could always write your own version of it.
Enjoy.
Interesting!
++
We have a different brainfuck here, it's written in doublespeak where treason is no longer a crime.
Use Whitespace and you can embed programs in your Arduino sketches.
(What has Brian done to deserve this topic?)
(What has Brian done to deserve this topic?)
++Karma; // LMAO! Well spotted! 
TheMemberFormerlyKnownAsAWOL:
(What has Brian done to deserve this topic?)
And did he enjoy it ?
...R
Wiki says:
Brainfuck is an esoteric programming language created in 1993 by Urban Müller, and is notable for its extreme minimalism.
The other end of the scale then, would seem to be Malbolge which I heard about in S1, E10 of Elementary.
Malbolge was specifically designed to be almost impossible to use
(=<`#9]~6ZY32Vx/4Rs+0No-&Jk)"Fh}|Bcy?`=*z]Kw%oG4UUS0/@-ejc(:'8dc(Johnny Lee Miller, best current Sherlock, btw, and brilliant as Eli Stone.)
GoForSmoke:
We have a different brainfuck here, it's written in doublespeak where treason is no longer a crime.
Did you not read the barn wall "Animals shall not sleep on beds with sheets"
And Romney stands up for principle when so many did not. Unless you believe Trump, then he's a democrat, like Satan only worse.