Neil Thapen is a game developer who's been working this in-browser simulator (dubbed "Pink Trombone") since 2015. You, the user, are given fine control over every important part of the human vocal tract; in theory, you should be able to make all sorts of sounds. In practice, having such fine grain control is really, really hard to manage. The results are simultaneously impressive and hilarious.
Hackersh ("Hacker Shell") is a free and open source shell (command interpreter) written in Python with Pythonect-like syntax, builtin security commands, and out of the box wrappers for various security tools. It is like Unix pipeline, but for processing security information and metadata rather than bytes.
a flight tracking service that provides you with real-time info about thousands of aircraft around the world. Using flight information data from aircraft by ADS-B transponder (in ~60% of all passenger aircraft) and delayed (~5 min) data from the Federal Aviation Administration (FAA).
a open source tool and free web service that lets you map your flights around the world, search and filter them in all sorts of interesting ways, calculate statistics automatically, and share your flights and trips with friends and the entire world (if you wish).