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Keep confirmed dividend dates and income forecasts in view

Sales-tax calculations and filings with a team to manage the work

Keep trade plans, checklists and later review in one journal

Explore Python interactively with completion, object introspection and persistent command history.

A Windows-based employee time clock with job tracking, overtime, PTO, and payroll-ready reports.

Connect a lease portfolio with accounting journals and disclosure reports

Crypto tax reports with transaction checks and optional expert help

US sales tax reporting, calculation and optional automated return filing

See how an asset allocation behaved across different starting years

Indirect tax calculation and compliance connected to business systems

Put checkout buttons and digital delivery on an existing website

Split group expenses and settle shared balances without creating accounts

Compare company fundamentals visually with historical stock valuations

Turn connected sales into tax invoices, threshold alerts and filing reports

Bank activity for personal cash-flow dashboards in spreadsheets

Practical finance, cooking and unit calculations

A catalogue of practical and specialist calculations

Focused browser calculators for statistical questions

Epidemiological calculations for surveys and test performance

Statistical power and effect-size calculation

Browser tools for beam and structural calculations

Building-services calculations with visible equations

Physics calculations with visual explanations

RF and microwave calculations with formula references