I'm not a spreadsheet guy, so I can't say how "good" they are, but Emacs has a few. Of course org-mode can do some of it (what can't org-mode do?), but in my experience it bogs down with larger datasets. Simple Emacs Speadsheet has been around a while and comes built-in these days, but I haven't tried it.
One nice thing is that Emacs has calc-mode built in that gives you all kinds of advanced math capability you can use. The tables in org-mode support this directly, but since calc has a Lisp interface you can use it pretty much anywhere.
One nice thing is that Emacs has calc-mode built in that gives you all kinds of advanced math capability you can use. The tables in org-mode support this directly, but since calc has a Lisp interface you can use it pretty much anywhere.