ioBroker - flexible and modular application for the IoT and Smarthome
Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
Wondershare MobileTrans - Wondershare MobileTrans is a 1-Click Phone to Phone Transfer for you to move data between devices with different operating systems. Your must-have phone Transfer.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
ApowerTrans - Transfer data from a phone to another phone.