Not affiliated in any way with Actual Budget, but I can’t recommend it enough. It’s the FOSS version of YNAB pretty much so if you’re a fan of envelope budgeting it’s a great tool. I’d even say it has quite a few other strengths compared to YNAB, and you can always be sure that your financial data stays within your reach.
Neat, I did already transfer my budgeting to GNUCash a few months ago, but this looks shiny too.