- Tree/mindmap rendering via https://github.com/markmap/markmap or https://github.com/dundalek/markmap
- JfrUnit for performance regression
- Git Build Hook Maven Plugin - Git Hook Like Functionality via Maven
- TornadoVM - Java on Heterogeneous Hardware like GPUs
- Graphite - procedural 2D raster and vector image editor
- Toolbox/Toolbx for local CLI tools and the Shell project.
- Smile — Statistical Machine Intelligence and Learning Engine for Java
- JITWatch provides an analyzer and logger for the Java's JIT.
- XPipe for managing connections like SSH and filesystem to remote servers of any kind.