Apache Doris is an easy-to-use, high performance and unified analytics database.

MIT Deep Learning Book in PDF format (complete and parts) by Ian Goodfellow, Yoshua Bengio and Aaron Courville

JanusGraph: an open-source, distributed graph database

The WebRTC module for React Native

converts binary PDF to JSON and text, for server-side PDF processing and command-line use.

Fast scalable time series database

Automated testing to find logic and performance bugs in database systems

A record-oriented store built on FoundationDB

A fast, log structured key-value store.

Concurrent Radix and Suffix Trees for Java

GeoWave provides geospatial and temporal indexing on top of Accumulo, HBase, BigTable, Cassandra, Kudu, Redis, RocksDB, and DynamoDB.

Distributed database warehouse for transactions, search and analytics across time.

Apache Tephra: Transactions for HBase.

SurrealDB SDK for Java

The Chronos versioning project aims to provide easy-to-use and reliable versioned data storage.