For those of you who like the idea of GNUCash but are looking for an easier tool to use (for us developer folks), check out https://plaintextaccounting.com.
I use a plain text ledger, ledger [1], and a Makefile for all the accounting needs of my LLC. Then I export to CSV whenever my accountant needs to get involved. It has worked great so far, even with a heap of currency conversions involved. Being able to easily leave comments for each entry has also been a blessing.
I've tried almost every tool, both free and proprietary, including GnuCash, before finally landing on ledger a few years ago. Ledger, when supplemented with little scripts, was the first tool that could handle the complexities of my financial world.
[1]: https://www.ledger-cli.org