TubeDB is free, open source under a GPL 3.0 license,
and 100% Java backend + web frontend.
Easy to install
You don’t have to be a Java pro. TubeDB comes with an integrated server. Download pre-build package or build from source automatically with Gradle.
Easy to use
You don’t have to be a database pro. TubeDB comes with an intuitive web-interface for preprocessing, gap filling, temporal aggregation and visualization.