Slingcode is a personal computing platform in a single html file. You can make, run, and share web apps with it. You don't need any complicated tools to use it, just a web browser. You don't need a server, hosting, or an SSL certificate to run the web apps. You can put Slingcode on a web site, run it from a USB stick, laptop, or phone, and it doesn't need an internet connection to work. You can "add to home screen" in your phone's browser to easily access your library of programs on the go. You can share apps peer-to-peer over WebTorrent. It's private. You only share what you choose.
Everything is kept in the browser's localstorage system.
It's written in Clojurescript with a bunch of dependencies, but the output is a single HTML page that you can drop anywhere. Probably easier to download it from the website (as recommended) and drop it someplace.