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• Blockly
• Bootstrap (front-end framework)

• Chart.js
• Collabora Online

• D3.js

• Etherpad

• Firefox Lockwise
• Foswiki

• Ghost (blogging platform)
• Globalize (JavaScript library)
• Greasemonkey

• HTTPS Everywhere

• Ionic (mobile app framework)

• Jasmine (JavaScript testing framework)
• JavaScript InfoVis Toolkit
• Joplin (software)
• JQuery

• Leaflet (software)
• Locker (software)

• Mailvelope
• Meteor (web framework)
• Mongoose (MongoDB)

• Netlify CMS
• Nextcloud
• Node.js
• Npm (software)

• OwnCloud

• Pentadactyl
• PlayCanvas
• Polymer (library)
• PostCSS
• Pump.io

• QUnit

• Raphaël (JavaScript library)
• RGraph

• Serverless Framework
• Socket.IO
• Study Notes
• SVG-edit

• TiddlyWiki

• Vega and Vega-Lite visualisation grammars]
• Velocity (JavaScript library)
• VisualEditor

• Wakanda (software)

• Implemented in the JavaScript Programming Language on DuckDuckGo
• Programmed in the JavaScript Programming Language on DuckDuckGo
• https://en.wikipedia.org/wiki/Category:Free_software_programmed_in_JavaScript