I am strongly against making a general policy that all answers should be run to completion before they can be considered tested and permitted to be posted. I can think of a few answers on this site ...
Tutorials Point Coding Ground has a ridiculous number of available IDEs and terminals. Some may require registration, some versions may be old/outdated.
Note that "APL" is a rather vague term and a program written for one of these interpreters is unlikely to work with one of the others.
Free software, runs on Linux. It's a bit sparse on ...
What should I do with my answer?
The real question is, what should we do with the challenge?
If new answers cannot be scored anymore because some outside resource became unavailable, I see only two ...
Download binaries or source: http://julialang.org/downloads.
Binaries are available for Windows, Mac, Ubuntu (.deb), Fedora/RHEL/CentOS/SL (.rpm), and generic Linux. Both 32- and 64-bit versions ...
Do Stuff Online
DSO is an online interpreter service I made that runs entirely in your browser. It's a complete work in progress, and mostly runs JS-based languages although I've managed to get some ...
TI-BASIC or TI-ASM
Texas Instruments graphing calculators run a simple OS with a BASIC interpreter on top of a z80 or m68k CPU. Newer calculators, or older calculators running modified software, can ...
Not to be confused with ES6Fiddle. ESFiddle allows for running ES6 and ES7 experimental features such as array comprehension and the exponentiation operator which no other transpiler does.
https://codio.com/ offers free Ubuntu virtual machines accessible in the browser.
The following languages are available out of the box:
https://jqplay.org – Not written by the language's developer himself, but the official jq Manual also uses it to run its examples.
jq play is more an interactive playground, so the checkboxes to ...