Currency & Exchange Rate Tools
XE.com – Live currency rates, conversion calculator.
OANDA FX – Forex analytics and API tools for traders.
X-Rates / Wise – Historical rates and cross-border money transfer data.
Business & Corporate Finance
QuickBooks / Xero – SMEs managing cash flow, invoices, taxes
Anaplan / Planful – FP&A modeling, scenario analysis
Excel / Google Sheets – Custom models, dashboards, forecasts