Great Circle Mapper
gcmap.comRoute maps and great-circle distance calculations
Route maps and great-circle distance calculations
Calculate returns, portfolio statistics and allocation weights in Python
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
Forms with response editing, routing, and collaborative results
Organizational ballots with voting weights, proxies and scheduled notices
Custom Google Forms with calculated answers and website styling.
Create process-control charts and statistical analyses inside a compatible Excel installation.
Build WordPress calculators with equations that use the visitor's form inputs.
Swap pricing with external feeds and on-chain proofs
Field forms collected through Android or a browser and synchronized with Central