fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists, and queues with a small memory footprint and fast access and insertion; it provides also big (64-bit) arrays, sets and lists, sorting algorithms, fast, practical I/O classes for binary and text files, and facilities for memory mapping large files. Note that if you have both this jar and fastutil-core.jar in your dependencies, fastutil-core.jar should be excluded.

Caffeine is a high performance, near optimal caching library. It provides an in-memory cache using a Google Guava inspired API.

Core libraries for Apache Spark, a unified analytics engine for large-scale data processing.

A lightweight mod loader for Minecraft that provides a flexible and modular environment for mod development and distribution.

Spigot

Confluence Core

Drools is a rule engine and a rule management system.

Spark Project Hive

Apache Solr (module: core)

Apache Parquet Avro

A fast java serialization drop in-replacement and some serialization based utils such as Structs and OffHeap Memory.