JobRunr makes background job processing in Java stupidly simple—just use lambdas instead of XML configs, and get automatic distribution, retries, and monitoring for free. But watch out for the production gotchas: the free version dies during database outages, refactoring method signatures breaks queued jobs, and recurring jobs can mysteriously skip executions under load.

n8n offers powerful multi-trigger workflows and extensive integrations for complex automation needs, but its fair-code license restricts commercial use without expensive licensing fees. ActivePieces provides a cleaner interface with simpler single-trigger workflows under a permissive MIT license, making it ideal for businesses that want to build and sell automation services without legal constraints....