Vision
Invoice 360 Cloud Sync is a free and open-source invoice system that supports cloud syncing and easy self-cloud-hosting. The app can operate locally on a device without a network connection and syncs data with the cloud when a connection is available. The server cloud is kept as simple as possible for ease of self-hosting without requiring tedious maintenance.

Project
This project aims to provide a simple yet complete invoice system for small business owners based on an existing and popular invoicing app, Invoice 360 (Please note that the current version in the Store works on local data only.) available in the Windows Store. You can follow the instructions provided here and self-host the server cloud on Microsoft Azure and make use of the syncing capabilities. Since this project is open-source, it is also possible for independent developers to extend the capabilities of the system.

Tutorials
Tutorial on running the Invoice 360 Client app on a demo cloud
Tutorial on Invoice 360 Cloud Sync Self-hosting