I use FreeAgent. It connects with all my business accounts and does automatic transaction matching to invoices. Sends emails and follow-ups. It also figures out all the tax things for me in the UK, not sure about other countries though.
Completely unrelated, but reading "FreeAgent" just now released a core memory for me of reading USENET in the 90s with the free version of Forte Agent. This site has the 16-color image that IIRC was the basis of the icon for Free Agent: http://www.diginfoserv.com/agent.html .. I think the icon was just zoomed in on the lady at the table?
edit: wow, of course there was a 16 bit version available:
> Agent is fully supported by the Agent Support Team and is available in 16 bit and 32 bit versions.
https://www.freeagent.com/