FiSQL is an idea. Pronounced like 'fiscal', the idea is an accounting system that works for your business. Implement the modules you need. Ignore the modules you don't. Own your data. Customize the system to your needs. Integrate it with the tools you want, or create your own.
FiSQL is the operating system for a small business: customers, vendors, bills, invoices, the general ledger, projects, time, and support tickets - with stock and warehousing still to come. It runs on a real SQL database you can point any tool at, and it grows one module at a time rather than arriving as a suite you have to swallow whole. The one-sentence version: run your whole business on a database you own.