ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
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Logstash - transport and process your logs, events, or other data
Apache Beam is a unified programming model for Batch and Streaming data processing.
Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
Thumbnailator - a thumbnail generation library for Java
An extremely easy way to perform background processing in Java. Backed by persistent storage. Open and free for commercial use.
A cluster computing framework for processing large-scale geospatial data
Simple API, Complex Emails (Jakarta Mail smtp wrapper)
Esper Complex Event Processing, Streaming SQL and Event Series Analysis
The simple, stupid batch framework for Java
PipelinR is a lightweight command processing pipeline ❍ ⇢ ❍ ⇢ ❍ for your Java awesome app.
An extensible Java framework for building event-driven applications that break up XML and non-XML data into chunks for data integration
The Frank!Framework is an easy-to-use, stateless integration framework which allows (transactional) messages to be modified and exchanged between different systems.
Fast, safe, complete libvips bindings for image processing in Java / JVM projects
Reflectionless command line parser
The Mines Java Toolkit
Read and write Excel (.xlsx, .xls), CSV, and ODS files in Java with one line of code. Annotation-based mapping, SAX streaming, built-in validation, 19 type converters, cell styling. A high-performance alternative to Apache POI.
Lightweight Java library for reading and writing fixed-width / fixed-length flat files using annotations on POJOs — for banking, payroll, EDI, mainframe, and batch integrations.
Develop streaming applications for IBM Streams in Python, Java & Scala.
Java Scientific Computing Library - Signal Processing, FFT, Filters, PSD, DCT, SciPy-like APIs for JVM & Android used in Machine Learning and Data Science.
Stateful actors on Apache Flink 2.x and Java 21 — durable per-key state, exactly-once messaging, Kafka and Kinesis I/O, Kubernetes-native deployment. Continues the Apache Stateful Functions programming model on the modern Flink line.