An easy to use, richly-featured, perpetual Jewish Calendar API
A perpetual Jewish Calendar API
converts between Hebrew and Gregorian dates using Rata Die (R.D.) algorithm by Dershowitz and Reingold
An easy to use, richly-featured, perpetual Jewish Calendar API
sunrise and sunset via NOAA algorithm with elevation, based on KosherJava
Torah Reading API for Parashat HaShavua and holidays
Daily learning schedules: Daf Yomi, Mishna Yomi, etc
Convert numbers to gematriya representation, and vice-versa.
Curated collection of data structures for the JavaScript/TypeScript.
Strict borsh compatible de/serializer
Jewish holidays and Hebrew calendar as plain JSON objects and CSV export
Translations for Hebcal events in multiple languages
Hebcal ES6 interface to GeoNames and USA ZIP code SQLite databases
Javascript Triennial Torah Readings
A React table component designed to allow presenting thousands of rows of data.
A superset of the JSDOM environment for Jest that respects Node.js globals.
OCSP Stapling implementation
mjml-hero
Fixed-point number types for JavaScript
ReactTable HOC for fixed columns
Jewish holidays and Hebrew calendar as iCalendar RFC 2445
Lightweight, dependency free, fast, customizable datepicker written in pure JavaScript. 
number, money and currency formatting library
A fixed width data parser