Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.

java
bpm
spring
cloud

apache /cassandra

Java10K4.1K

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

o3de /o3de

C++9.8K2.6K

Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.

3d-graphics-engine
3d-graphics
animation
game-development

apache /seatunnel

Java9.8K2.5K

SeaTunnel is a multimodal, high-performance, distributed, massive data integration tool.

data-integration
high-performance
offline
real-time

apache /jmeter

Java9.6K2.3K

Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services

java
performance
test

apache /iceberg

Java9.4K3.7K

Apache Iceberg

iceberg
apache
hacktoberfest

risingwavelabs /risingwave

Rust9.4K863

Event streaming platform for agentic AI. Continuously ingest, transform, and serve event streams in real time, at scale.

apache /shenyu

Java8.9K3.1K

Apache ShenYu is a Java native API Gateway for service proxy, protocol conversion and API governance.

api-gateway
http-proxy
dubbo-proxy
sofa-proxy

apache /beam

Java8.7K4.8K

Apache Beam is a unified programming model for Batch and Streaming data processing.

python
java
big-data
beam

vaexio /vaex

Python8.5K600

Out-of-Core hybrid Apache Arrow/NumPy DataFrame for Python, ML, visualization and exploration of big tabular data at a billion rows per second 🚀

dataframe
python
bigdata
tabular-data

apache /caldera

Python7.5K1.4K

Automated Adversary Emulation Platform

adversary-emulation
caldera
security-automation
red-team

apache /hertzbeat

Java7.5K1.4K

An AI-powered next-generation open source real-time observability system.

apache /couchdb

Erlang7K1.1K

Seamless multi-primary syncing database with an intuitive HTTP/JSON API, designed for reliability

content
network-server
http
cloud

wurstmeister /kafka-docker

Shell6.9K2.6K

Dockerfile for Apache Kafka

apache /openwhisk

Scala6.8K1.2K

Apache OpenWhisk is an open source serverless cloud platform

openwhisk
apache
serverless
cloud

apache /storm

Java6.7K4K

Apache Storm

storm
apache
distributed
streaming

pixie-io /pixie

C++6.6K507

Instant Kubernetes-Native Application Observability

golang
kubernetes
ebpf
vega

apache /camel

Java6.4K5.2K

Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.