Fable built me a version that covered all of my needs in an hour. (Clients pay me via ACH/wire - maybe it would have taken a day if I needed a stripe integration?). Runs on localhost with SQLite - incredibly basic, but I enjoy it twice as much as Harvest.

I used my Harvest data export and generated PDF invoices as the majority of the “spec”.

Feels silly to open source this, given how little effort it was… (and because I’m certainly not going to respond to others PRs) but I’m happy to if anyone wants.