GnuCash
I once wrote about using GnuCash as a freelance solo developer at <a href="https:&#x2F;&#x2F;nickjanetakis.com&#x2F;blog&#x2F;using-gnucash-as-a-freelancer-to-track-finances-and-prepare-taxes" rel="nofollow">https:&#x2F;&#x2F;nickjanetakis.com&#x2F;blog&#x2F;using-gnucash-as-a-freelancer...</a>.<p>I started using it in 2017 and still use it today. It&#x27;s still really solid and makes filing quarterly taxes not too painful. In my opinion it&#x27;s one of the best tools out there if you like your privacy and don&#x27;t want to link your bank accounts to a third party service.