java

Jenkins is the leading open-source automation server that enables developers to build, test, and deploy their software. With over 1,800 plugins and a massive community, it provides unparalleled flexibility and extensibility for continuous integration and continuous delivery workflows.

HDFS is a distributed file system designed to store large datasets reliably and provide high-throughput access to application data. It's the storage foundation of the Apache Hadoop ecosystem.

Komga is a media server for comics, mangas, BDs, magazines and eBooks with API and OPDS support, offering a modern web interface for exploring libraries and a feature-rich web reader.

CloudStack is an open-source cloud computing software platform for creating, managing, and deploying infrastructure cloud services. Built with Java and Python, it provides a complete Infrastructure-as-a-Service (IaaS) solution with comprehensive virtualization and cloud management capabilities.

Tolgee is a developer & translator friendly web-based localization platform enabling users to translate directly in the app they develop. Built with Java, it provides in-context translation capabilities and comprehensive localization management for modern applications.

Peergos is a secure and private space online where you can store, share and view your photos, videos, music and documents. It also includes a calendar, news feed, task lists, chat and email client, providing a comprehensive private cloud platform with end-to-end encryption.

Gerrit is a code review and project management tool for Git-based projects. Built with Java, it provides a web-based platform for reviewing code changes, managing Git repositories, and facilitating collaborative software development with sophisticated workflow management.

Para is a flexible and modular backend framework/server for object persistence, API development and authentication. Built with Java, it provides a comprehensive backend-as-a-service platform with built-in database management, user authentication, and API generation capabilities.

XtreemFS is a distributed, replicated and fault-tolerant file system designed for federated IT infrastructures, providing POSIX compliance and geographic distribution capabilities.

TeamCity is a powerful continuous integration and build management system developed by JetBrains. It provides excellent IDE integration, comprehensive build management, and enterprise-grade features with both free and commercial licensing options.

Fedora is a robust, modular, open source repository system for the management and dissemination of digital content, particularly suited for digital libraries and archives.

Atsumeru is a free self-hosted manga/comic/light novel media server with native clients for Windows, Linux, macOS, and Android, offering comprehensive library management and reading features.