The new king on the block: uv. It can do everything poetry does, while also using a standard pyproject.toml (no more weird ^), and it'll handle the Python version for you, so no faffing about with manually installing anything. Just uv sync and off you go!

Downside: not compatible with virtualenvwrapper, as it'll force its .venv in the local folder.

It's also still under heavy development and breaking changes are still expected, but it's already super nice to use.

Same guys (Astral) also made ruff the formatter/linter that they intend to eventually integrate into uv, IIRC.

I'm running all my personal projects under uv and am having a blast. It's so fast.