JavaScript

• timeline.js: easy-to-make, beautiful timelines
• recharts.js: A composable charting library built on React components
• TierMobility/tile38-ts: TypeScript client for Tile38 geo-database
• tidwall/airports: Visualize the nearest 10 airports on a globe.

Geospatial

• manuelbieh/geolib: Zero dependency library to provide some basic geo functions

CLI's

• A JavaScript Executable
• Building a TypeScript CLI with Node.js and Commander
• Deno: Compiling Executables
• lirantal/nodejs-cli-apps-best-practices: The largest Node.js CLI Apps best practices list sparkles