FasterXML / jackson-core

Core part of Jackson that defines Streaming API as well as basic shared abstractions

deltachat / deltachat-android

Decentralized private messenger with chat-shared tools and games for Android

aklivity / zilla

🦎 A lightweight, multi-protocol gateway for event-driven applications and AI agents. Expose and govern Kafka, MQTT, APIs, and MCP through one high-performance engine with shared routing, security, schema, and observability.

spring-projects / spring-data-commons

Spring Data Commons. Interfaces and code shared between the various datastore specific implementations.

KirstenAli / nitromap

A zero-dependency embedded Java record store that adds asynchronous persistence, SQL-like querying, and shared-nothing clustering to the familiar ConcurrentHashMap API.