Clubhouse is awesome for software projects. It's similar to Pivotal Tracker, but the UI is nicer.
They no longer have a free plan (except for those of us who got grandfathered in), but the price is manageable and I'd recommend it for a team.
For personal stuff, I mostly use Things. Or a gitignore'd todo.txt. I'm one person, and can only do one thing at a time. So tracking progress in a more granular way doesn't have much value for me. I just need somewhere to write down future tasks.
Thank you for such an extensive reply! Need to check these tools out...
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