There are 3 repositories under xbox-live topic.
Experimenting with the revival of Xbox Live 1.0
Export your local save from your Xbox Live or Game Pass games
Powerful xbox live library for javascript
Find Twitch, Mixer, and Xbox recorded by the players you encounter in Destiny 2.
Halo: Master Chief Collection Stat Notifier, send an SMS to tell your friends you're online
Real-time tracking of Xbox Live players activities
Including XBL-Integration class library + UWP - Xbox Live Programming Guide
Extracts the contents of the Marble Blast Ultra (Xbox Live Arcade) marble.bza archive
Display an electronJs window to authenticate Minecraft accounts through Xbox Live.
XBOX Game Price Campare Tool - WeChat App
Online platform implementation of Xbox Live for games made with Flax Engine
Minecraft統合版でフレンド追加から外部サーバーへ接続できるようにするためのプログラム
With this piece you can view an Xbox Live user's data by image. Use this mini library for your discord bot
Discord bot that allows you to get updates when server members are playing your favorite games. Fully customizable and extensible.
Node.js service, returns 100 Destiny Xbox DVR clips for a provided Gamertag
The full No KV UmbrellaLive Client source code.
An open-source Python program to store and manage Xbox Game Pass membership codes in an SQLite database. The program uses Tkinter to create a graphical user interface (GUI) to enter and display codes. The program uses an SQLite database to store the codes, allowing the user to delete codes from the database.
Website documenting Xbox hacking and research projects
The XBLUmbrella listener source code.