Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation
B4R - Development tool for native Arduino programs.
Tableau - Tableau can help anyone see and understand their data. Connect to almost any database, drag and drop to create visualizations, and share with a click.
PlatformIO - Next-generation IDE for IoT
Qlik - Qlik offers an Active Intelligence platform, delivering end-to-end, real-time data integration and analytics cloud solutions to close the gaps between data, insights, and action.