Alternatives and similar repositories for demos:

Users that are interested in demos are comparing it to the libraries listed below

• WebBluetoothCG / web-bluetooth
  Bluetooth support for the Web.
  ☆1,408Updated last week
• w3c / web-nfc
  Web NFC
  ☆315Updated 4 months ago
• monteslu / webusb-serial
  virtual serialport implementation using web usb as its transport
  ☆110Updated 4 years ago
• GoogleChromeLabs / airhorn
  Air horn
  ☆369Updated 2 months ago
• don / cordova-plugin-ble-central
  Bluetooth Low Energy (BLE) Central plugin for Apache Cordova (aka PhoneGap)
  ☆945Updated last week
• WICG / background-fetch
  API proposal for background downloading/uploading
  ☆283Updated last year
• thegecko / webbluetooth
  Node.js implementation of the Web Bluetooth Specification
  ☆159Updated this week
• WICG / serial
  Serial ports API for the platform.
  ☆268Updated 5 months ago
• noble / node-bluetooth-hci-socket
  ☆155Updated 3 years ago
• abandonware / noble
  A Node.js BLE (Bluetooth Low Energy) central module : Community maintained
  ☆556Updated last week
• zurfyx / eddystone-web-bluetooth
  Web Bluetooth Eddystone made easier.
  ☆36Updated 7 years ago
• IjzerenHein / node-web-bluetooth
  Web Bluetooth API and interactive device picker for node.js
  ☆74Updated 3 years ago
• noble / bleno
  A Node.js module for implementing BLE (Bluetooth Low Energy) peripherals
  ☆2,134Updated 3 years ago
• evothings / cordova-ble
  Bluetooth Low Energy plugin for Cordova
  ☆243Updated 6 years ago
• googlearchive / chrome-nfc
  Chrome App NFC Library
  ☆213Updated 7 years ago
• LukasBombach / sblendid
  A JavaScript Bluetooth Low Energy (BLE) Library
  ☆64Updated 4 years ago
• don / node-eddystone-beacon
  Create an Eddystone Beacon using Node.js https://github.com/google/eddystone
  ☆315Updated 7 years ago
• GoogleChromeLabs / imagecapture-polyfill
  MediaStream ImageCapture polyfill. Take photos from the browser as easy as .takePhoto().then(processPhoto)
  ☆186Updated 4 years ago
• WICG / webusb
  Connecting hardware to the web.
  ☆1,342Updated last week
• thegecko / bleat
  Abstraction library for hiding differences in JavaScript BLE APIs
  ☆48Updated 2 years ago
• WICG / shape-detection-api
  Detection of shapes (faces, QR codes) in images
  ☆309Updated last month
• daphtdazz / WebBLE
  iOS WebBluetooth Polyfill
  ☆118Updated last year
• w3c / sensors
  Generic Sensor API
  ☆128Updated 11 months ago
• adafruit / Adafruit_Python_BluefruitLE
  Python library to simplify access to Bluetooth low energy devices and services on Linux (using bluez) and Mac OSX.
  ☆395Updated 4 years ago
• randdusing / cordova-plugin-bluetoothle
  Bluetooth Low Energy Phonegap Plugin
  ☆803Updated 10 months ago
• urish / web-bluetooth-polyfill
  Windows 10 Web Bluetooth Polyfill
  ☆77Updated 3 years ago
• PaulKinlan / qrcode
  The best web based QR Code reader on the web
  ☆364Updated 2 years ago
• NordicPlayground / webapp-nordic-thingy
  Thingy:52 reference web app
  ☆55Updated 3 years ago
• poshaughnessy / web-bluetooth-parrot-drone
  Control a Parrot Mini Drone from your web browser using Web Bluetooth
  ☆95Updated 2 years ago
• sandeepmistry / node-bbc-microbit
  Control a BBC micro:bit from Node.js using BLE
  ☆83Updated 6 years ago