Open source, maintained in public
qscommons starts with open quantum software, and is built to hold learning sites, hardware development guides and research too, each checked against a reference and documented with results you can reproduce. One maintainer runs it today.
Most open quantum software comes from the companies that build quantum hardware, and each toolkit works its own way.
Qiskit, Cirq, the Braket SDK and CUDA-Q are open source, but each is shaped around its maker's machines or cloud, with its own circuit model, its own install and its own docs. Moving between them, or teaching from them, means learning each one again.
I'm kaiwave, a student who likes building models of how things work, and quantum circuits are the model I keep coming back to. I started qscommons for the tools I wanted and couldn't find in one place: ones that install in one line, run on the computer you already have, check their results against an independent reference, and explain the physics as they go.
qsengine was the first. The goal is wider than software: sites that teach the physics, guides for building quantum hardware, and open research, all held to the same standard, so what you learn from one carries over to the next.
The first circuit a student runs, the guide someone builds hardware from and the last experiment in a paper should stand on the same ground: open, checked against a reference, documented with output you can reproduce.
