Useful tools, ready when you are.

Quality Assurance

Database Test Checklist

Create a bounded, reviewable database test checklist with visible assumptions, downloadable output, and accountable human review.

Date Difference Calculator

Compare dates in calendar units with explicit elapsed or inclusive day counting.

Physics

De Broglie Wavelength Calculator

Calculate de broglie wavelength with guided inputs, visible equations, substituted working, and model assumptions.

Automation & Integrations

Dead Letter Queue Planner

Create a bounded, editable dead letter queue planner from supplied workflow facts with transparent rules and integration safeguards.

Sales & CRM

Deal Desk Checklist

Create a bounded, browser-local deal desk checklist with clear inputs, guided review, and a practical output.

Sales & CRM

Deal Probability Calculator

Create a bounded, browser-local deal probability calculator with visible assumptions, review guidance, and downloadable output.

Physics

Dean Number Curved Flow Calculator

Combine supplied Reynolds number with a documented passage-curvature ratio.

Debt Consolidation Calculator

Compare same-term current and consolidated debt after a financed fee.

Debt Payoff Calculator

Estimate payoff time and interest with a fixed payment and optional extra payment.

Debt Payoff Time Calculator

Estimate fixed-payment debt payoff duration, interest, and repayment.

Debt Service Coverage Calculator

Measure annual operating income against principal and interest debt service.

Debt-to-Equity Calculator

Compare interest-bearing debt with shareholders equity.