You may be familiar with JSFiddle and CodePen, but there are similar tools for a variety of languages, some more practical than others. [more inside]
Coding Ground is an amazingly comprehensive set of free online terminals and IDEs for about 100 different computing languages. The list includes Unix languages (bash, ksh, awk), cross-platform languages (Ruby, Python, Perl, Java, etc.), web languages (coffeescript, Go, Dart, jQuery) MS Windows-specific languages, markup languages (CSS3, HTML, Markdown), and even a bunch of esoteric languages (Malbolge, LOLCODE, Brainf**k, and Whitespace). These (appear to) run in fully sandboxed Docker-based containers.
A few months ago there was a list of links to classic video game emulators posted. Very recently, I'm pleased to report, those links all came true. The Internet Archive bespoke upon aforementioned consoles, computers, and mileposts on our way to the tech utopia of today, (seriously, where's my flying car?) and they asked us to do something: Imagine every computer that ever existed, literally, in your browser. And it was so. I have absolutely no affiliation with jscott, btw. Thought I should disclose that.
IDE the Shanty One is the front man for the Creative Juices crew out of NYC. He raps and produces. His 2007 production Force Fed is a great listen for fans of hard, New York rap artists like F.T. and Wu-Tang Clan. IDE is interviewed about how the crew formed. Listen to any of 148 solo tracks from him or 55 from Creative Juices. Already a fan? He just announced his new album Snapped. [more inside]