A powerful 🚀 Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

QuestDB is a high performance, open-source, time-series database

Apache Pulsar - distributed pub-sub messaging system

Apache Iceberg

Upserts, Deletes And Incremental Processing on Big Data.

Apache Fluss is a streaming storage built for real-time analytics.

Core library of PlantUML that runs completely on javascript without needing java/servers