[Captain Jack Aubrey]

What does it do everything else that Quicken does, including tracking my investments and my charge cards and my properties and my stocks?

[E. Pluribus Unum]

What does it do everything else that Quicken does, including tracking my investments and my charge cards and my properties and my stocks?

GunCash is fairly mature now and is meant to emulate Quicken.

Here are a couple of quick links I found.

Credit cards:

https://www.gnucash.org/docs/v4/C/gnucash-guide/chapter_cc.html

https://www.youtube.com/watch?v=6GinwChkkaU

Stock market accounts:

https://www.gnucash.org/docs/v4/C/gnucash-guide/chapter_invest.html

https://www.youtube.com/watch?v=R787iQYVdE8

[E. Pluribus Unum]

Here is a link to the GnuCash user manual. Gives an overview of what it does.