Cost / License
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- Java
Browse 189 Java Libraries and Tools on AlternativeTo.
Hydra is built upon Netty. It is supposed to simplify the process of socket setup in Java. Hydra is a lightweight library that is supposed to help the developer. Hydra is designed to be an easy and fast library. And it's developed with care and love.
inspectIT Ocelot is a Java agent that allows you to extract any kind of data and information out of your Java application and consume the data using a big variety of established monitoring tools such as Prometheus, Zipkin, Grafana and many, many more.
AgensBrowser is a web interface for AgensGraph to visualize and manage graph data. AgensBrowser offers the interactive visualization of graphs and enables you to query and modify graph data using Cypher and SQL on the web.


A JAR dependency walker made for analyzing and visualizing the dependencies of JAR files. It helps developers ensure their applications have the correct libraries and resolve potential conflicts.



EU-hosted managed identity platform. OAuth 2.0, OpenID Connect, SAML. White-labeling, multi-tenancy, passkeys. Frankfurt datacenter. Free tier included.




Writing unit tests can be hard and sometimes good design has to be sacrificed for the sole purpose of testability. Often testability corresponds to good design, but this is not always the case. For example final classes and methods cannot be used, private methods sometimes need...
PyxleOS is an open source Java based pixel editor. Why is it special? Because it is written in Java, it is inherently cross platform. This means any computer running Java (JVM) can run PyxleOS!



An artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Engineering teams use Oso when they’re done rolling their own permissions. It lets your application answer questions like “can this user read that document?” and “which objects can this agent manage?”



A free, open-source, cross-platform desktop Markdown editor for producing beautifully typeset PDFs.




Cityographer lets you instantly create a city map and details (residents, store inventories & prices, etc.) You can have the program do it all in one step, or run it in a step-by-step fashion and edit the map and details as you go.