Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
ioBroker - flexible and modular application for the IoT and Smarthome
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.