Airport METAR weather - decoded current conditions, flight category (VFR/IFR), wind, visibility, ceiling, altimeter and raw report for up to 5 ICAO airports

Airport TAF forecast - decoded terminal forecast periods with wind, visibility, ceiling, flight category and the worst expected category for an ICAO airport

Brazilian national holidays for a year - date, name and weekday

Bitcoin network status - block height and fee estimates in sat/vB from next block to 1 day

Savings goal calculator - months to reach a target from monthly savings, current balance and interest rate

Add days or business days to a date - calendar or weekday offset from a start date, returns the resulting date and weekday

Paris Velib bike availability - real-time bikes, e-bikes and free docks for any station by name or street

FDIC insured bank lookup by name - total assets, deposits, branches, charter class, regulator, city and state for US banks

Age calculator from birthdate - exact age in years, months and days, total days lived and days until the next birthday

Lichess daily chess puzzle - FEN position, rating, themes and UCI solution moves

Compound interest calculator - final balance, interest earned and year-by-year growth for a principal, rate, years and optional monthly contribution

ROI calculator - return on investment percent, gain, multiple and annualized return from amount invested and returned

Brazilian bank list - ISPB, Banco Central code and legal name for every institution

Unix timestamp converter - unix seconds or milliseconds to ISO 8601 date, weekday and day of year, or a date to unix time

Profit margin and markup calculator - margin percent, markup percent and profit from cost and price, or the price for a target margin

Cemetery and burial-site reference - identity, coordinates, inception and official links (Wikidata)

Days between two dates calculator - total days, weeks, years-months-days and business days between any two dates

Crypto slippage - what a USD trade size costs on the Coinbase, Kraken, Bitstamp and Gemini order books, with spread, average fill price, slippage percent and best venue to buy or sell

Area converter - convert between acres, hectares, square meters, square feet and square kilometers with all equivalents

Kimchi premium - Upbit KRW price vs global USD price for a coin, with premium percent adjusted for the live USDT/USD rate, implied KRW per USD and 24h change