- mapdb 2,001 MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
- JDBM3 260 Embedded Key Value Java Database
- mapdb-hz-offheap 37 Provides off-heap storage for in-memory datagrid build in Turkey
- asterope-scala-legacy 7 Astronomy charting, observation planning, ephemeris and image processing app.
- HEALPix 7 Astronomical sphere pixelization improved with range trees.