GSmartControl is a graphical user interface for smartctl (from smartmontools package), which is a tool for querying and controlling SMART.
License: Open Source
GSmartControl is a free and open-source application focused on S.M.A.R.T. monitoring and real-time analysis, making it suitable for users who prefer a lightweight tool for disk health checks. In contrast, HD Tune offers extensive benchmarking features and performance testing, catering to users who require detailed performance metrics and error scanning.