Bookkeeping core
Lexware Office
SKR03 and SKR04 are supported and a switch migrates every booking to the new chart, and the monthly automatic Festschreibung with its protocol gives a real lock on the month. The fiscal year is hard-wired to the calendar year, and I found no public information on manual free postings, journals, opening balances, cost centres, recurring entries or accruals.
Xero
The evidence names modules 'invoicing, payroll, and reporting' and features like reconcile, dashboards and forecasts — but not one word on double-entry, a chart of accounts, journals, opening balances or a period close. A ledger that isn't evidenced doesn't exist; this sits at the anchor-0 floor.