Open Source Projects tagged "Java"
A curated collection of the best open source projects tagged "Java". Each listing includes a website screenshot along with a detailed review of its features.
The leading distributed search and analytics engine
Stars
78,347Last commit
8 hours agoLicense
Unknown
Elasticsearch is an open-source, RESTful search engine designed for scalability, reliability, and easy management.
Open Source Alternative to:
Free database manager for SQL databases and beyond
Stars
52,184Last commit
7 hours agoLicense
Apache-2.0
Cross-platform database management tool for exploring, editing, and querying SQL databases including MySQL, PostgreSQL, SQLite, MariaDB, and more.
Open Source Alternative to:
Empower your team to build custom internal tools rapidly
Stars
41,111Last commit
8 hours agoLicense
Apache-2.0
Low-code platform for creating powerful internal tools and dashboards with drag-and-drop ease, robust integrations, and customizable workflows.
Open Source Alternative to:
Declarative workflow orchestration for data, AI, and infra
Stars
Stars growing over the last 30 days29,964Last commit
7 hours agoLicense
Apache-2.0
YAML-based orchestration platform with 1400+ plugins for running data pipelines, AI workflows, and infrastructure automation across teams at scale.
Open Source Alternative to:
Open-source data integration for modern teams
Stars
22,258Last commit
8 hours agoLicense
Elastic-2.0
Seamlessly sync data from any source to any destination with a flexible, extensible platform that grows with your data needs.
Open Source Alternative to:
Privacy-first offline maps for hiking, cycling & navigation
Stars
15,745Last commit
8 hours agoLicense
Apache-2.0
Free, open-source offline maps app with detailed trails, turn-by-turn navigation, and zero tracking. Perfect for hikers, cyclists, and travelers seeking privacy.
Open Source Alternative to:
High-performance time-series database for massive data scale
Stars
17,466Last commit
7 hours agoLicense
Apache-2.0
Open-source time-series database offering massive ingestion throughput, millisecond queries, and SQL extensions, designed for optimal performance at any hardware scale.
Open Source Alternative to:
Open-source search and analytics at enterprise scale
Stars
13,901Last commit
9 hours agoLicense
Apache-2.0
Community-driven, Apache 2.0-licensed search and analytics suite for ingesting, searching, visualizing, and analyzing data at scale with AI/ML capabilities.
Open Source Alternative to:
Secure, customizable authentication for your applications
Stars
15,332Last commit
20 hours agoLicense
Unknown
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.
Open Source Alternative to:
Client-side encryption for your cloud files
Stars
16,331Last commit
11 hours agoLicense
GPL-3.0
Encrypts files and filenames locally before they reach Dropbox, Google Drive, OneDrive, or any other cloud, so only you hold the key.
Open Source Alternative to:
Centralize, transform, and stash your data
Stars
14,965Last commit
7 hours agoLicense
Unknown
Logstash is a free and open server-side data processing pipeline that ingests data from multiple sources, transforms it, and sends it to your desired destination.
Open Source Alternative to:
Time-series database built for industrial IoT workloads
Stars
6,419Last commit
14 hours agoLicense
Apache-2.0
Apache IoTDB manages industrial IoT time-series data with high-throughput read/write, edge-cloud sync, ultra-high compression, and integrations with Hadoop, Spark, Flink, and Grafana.
Open Source Alternative to:
Distributed OLAP database for real-time analytics at scale
Stars
6,164Last commit
7 hours agoLicense
Apache-2.0
Sub-second SQL queries on fresh streaming data at petabyte scale, built for high-concurrency user-facing apps and AI agent backends.
Open Source Alternative to:
Navigate anywhere offline with complete privacy
Stars
Stars growing over the last 30 days2,184Last commit
10 hours agoLicense
Apache-2.0
Offline navigation app for hiking, biking, and driving. No tracking, no data collection, community-driven maps. Works without internet connection.
Open Source Alternative to:
Secure, private, and decentralized file storage
Stars
2,541Last commit
13 hours agoLicense
AGPL-3.0
A peer-to-peer encrypted filesystem for secure file storage, sharing, and collaboration with end-to-end encryption and user-controlled data.
Open Source Alternative to:
Build AI agents and automate complex workflows seamlessly
Stars
Stars growing over the last 30 days1,044Last commit
7 hours agoLicense
Apache-2.0
Create intelligent automation workflows combining AI agents with your favorite apps and services. Connect, automate, and scale your operations without complex coding.
Open Source Alternative to:
Unified API, event, and AI agent management platform
Stars
462Last commit
8 hours agoLicense
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Open Source Alternative to:
Connect APIs, databases, and streams without glue code
Stars
360Last commit
4 months agoLicense
Unknown
Automated data integration platform that connects APIs, databases, and event streams using semantic schemas. Deploy secure integrations in minutes with Git-based workflows.
Open Source Alternative to:
Sent – A unified API for sending messages across SMS, RCS, and apps like WhatsApp.
Docmost
Sent