New Java Libraries 2025

last commit 7 months ago fusesource/jansi 1K

added 21 hours ago

Jansi is a small java library that allows you to use ANSI escape sequences to format your console output which works even on windows.

Java CLI Libraries

last commit 1 month ago kusoroadeolu/clique 29

added 21 hours ago

A lightweight Java framework for styling and beautifying terminal output

Java CLI Libraries

last commit 4 days ago softwaremill/jox 387

added 21 hours ago

Virtual-thread based safe concurrency & streaming

Java Concurrency Libraries Kotlin Concurrency Libraries

last commit 1 day ago bluuewhale/hash-smith 76

added 1 day ago

Fast & memory efficient hash tables for Java

Java Data Structures

last commit 2 weeks ago mokksy/ai-mocks 33

added 1 week ago

AI-Mocks is a Kotlin-based mock server toolkit that brings service virtualization to both HTTP/SSE and LLM APIs â think WireMock meets local OpenAI/Anthropic/Gemini/A2A testing, but with real streaming and Server-Sent Events support.

Java Testing Libraries AI / ML Libraries Integration Testing Libraries Kotlin Testing Libraries AI / ML Libraries Integration Testing Libraries

last commit 2 days ago line/armeria 5K +2

added 1 week ago

Armeria is your go-to microservice framework for any situation. Brought to you by the creator of Netty.

Java Microservices Frameworks

last commit 8 months ago f4b6a3/uuid-creator 619 +11

added 1 week ago

UUID Creator is a Java library for generating Universally Unique Identifiers.

Java ID Generators

last commit 5 days ago spotbugs/spotbugs 3K +9

added 1 week ago

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Java Code Quality Tools

last commit 1 month ago jsendnsca/jsendnsca 14

added 3 weeks ago

JSend NSCA is Java API for sending passive checks to the Nagios NSCA add-on.

Java Nagios Libraries

last commit 1 month ago gunnarmorling/persistasaurus 34

added 1 month ago

A minimal durable execution library for Java, based on SQLite.

Java State Machine Libraries Workflow Engines

last commit 1 month ago apache/fesod 5K

added 1 month ago

Processing Excels without worrying about large files causing OOM.

Java Word / Excel Libraries

last commit 2 days ago frankframework/frankframework 152 +1

added 2 months ago

A stateless integration framework to easily and uniformly exchange (transactional, batch and streaming) data between systems.

Java Integration Frameworks

last commit 1 month ago lfdt-web3j/web3j 5K +5

added 2 months ago

Web3j is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with clients (nodes) on the Ethereum network:

Java Ethereum Libraries Blockchain Libraries

last commit 2 months ago coobird/thumbnailator 5K +7

added 2 months ago

A thumbnail generation library for Java

Java Image Libraries Image Croppers Android Image Libraries Image Croppers

last commit 2 days ago apache/hbase 5K +13

added 2 months ago

Apache HBase is an open-source, distributed, versioned, column-oriented store modeled after Google' Bigtable.

Java Databases

New Java Libraries 2025

last commit 7 months ago fusesource/jansi 1K

Jansi is a small java library that allows you to use ANSI escape sequences to format your console output which works even on windows.

last commit 1 month ago kusoroadeolu/clique 29

A lightweight Java framework for styling and beautifying terminal output

last commit 4 days ago softwaremill/jox 387

Virtual-thread based safe concurrency & streaming

last commit 1 day ago bluuewhale/hash-smith 76

Fast & memory efficient hash tables for Java

last commit 2 weeks ago mokksy/ai-mocks 33

AI-Mocks is a Kotlin-based mock server toolkit that brings service virtualization to both HTTP/SSE and LLM APIs â think WireMock meets local OpenAI/Anthropic/Gemini/A2A testing, but with real streaming and Server-Sent Events support.

last commit 2 days ago line/armeria 5K +2

Armeria is your go-to microservice framework for any situation. Brought to you by the creator of Netty.

last commit 8 months ago f4b6a3/uuid-creator 619 +11

UUID Creator is a Java library for generating Universally Unique Identifiers.

last commit 5 days ago spotbugs/spotbugs 3K +9

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

last commit 1 month ago jsendnsca/jsendnsca 14

JSend NSCA is Java API for sending passive checks to the Nagios NSCA add-on.

last commit 1 month ago gunnarmorling/persistasaurus 34

A minimal durable execution library for Java, based on SQLite.

last commit 1 month ago apache/fesod 5K

Processing Excels without worrying about large files causing OOM.

last commit 2 days ago frankframework/frankframework 152 +1

A stateless integration framework to easily and uniformly exchange (transactional, batch and streaming) data between systems.

last commit 1 month ago lfdt-web3j/web3j 5K +5

Web3j is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with clients (nodes) on the Ethereum network:

last commit 2 months ago coobird/thumbnailator 5K +7

A thumbnail generation library for Java

last commit 2 days ago apache/hbase 5K +13

Apache HBase is an open-source, distributed, versioned, column-oriented store modeled after Google' Bigtable.

AI-Mocks is a Kotlin-based mock server toolkit that brings service virtualization to both HTTP/SSE and LLM APIs â think WireMock meets local OpenAI/Anthropic/Gemini/A2A testing, but with real streaming and Server-Sent Events support.