Top 4 Java workflow-management Projects

conductor

5 10,230 9.3 Java

Conductor is an event driven orchestration platform (by conductor-oss)

Project mention: Show HN: Hatchet – Open-source distributed task queue | news.ycombinator.com | 2024-03-08

unify-flowret

2 90 5.7 Java

A lightweight Java based orchestration engine

Project mention: Show HN: Workflow Orchestrator in Golang | news.ycombinator.com | 2024-03-04

Nice. It is great to see native lightweight opensource (I hope it is considering that someone said that there is no license file yet) solutions hit this space. For what it's worth, I have built something similar to this but for Java programming language. You can find it here -> https://github.com/americanexpress/unify-flowret. My reason for building something like this was that the product market is just too unwieldy to work with and has multiple layers of complexity which most of the time can be done away with. Just my opinion.
On a side note, you will at some point in time have to deal with multi version workflows. I know that this is one feature that limits wide adoption of an orchestrator.

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kafka-workflow

3 10 0.0 Java

Simple Workflow As Code on Kafka
javactrl-kafka

10 8 0.7 Java

Workflow As Code on Kafka

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).