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 (free bank syncing in the EU with more banks supported for example), and you can always be sure that your financial data stays within your reach.
Nope, which honestly annoys me but is pretty par for the course.
I personally use Fidelity for investment tracking. My main “checking” is their Cash Management Account, my “savings” is a brokerage account (invested in t-bills and money market funds), and I can link all of my other accounts and it pulls in specific investments and shows a consolidated view. It’s awesome because it shows all kinds of stuff, like morningstar-style factor weights, sector exposure, etc. It’s not self-hosted, but I trust them with my banking anyway, so it’s not like I’m opening myself up to some new exploit (oh, and Fidelity also has proper MFA; Symantic VIP, which kinda sucks, but it’s way better than any other financial institution).
I used to track this stuff via a Google spreadsheet (couldn’t find a way to get stock quotes in LibreOffice), but this seems to be good enough for me.