jBPM might be a bit more popular than Sanako. We know about 1 link to it since March 2021 and only 1 link to Sanako. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Haven't tried them personally, but had run across https://sanako.com/ and https://withprimer.com/. Looks like primer is more for home-schooling though. Source: almost 3 years ago
Https://jbpm.org, https://kogito.kie.org, and the other projects under the https://kie.org umbrella are also worth looking into. Jbpm is the grandfather of several of the Java based BPMN solutions if I'm not mistaken. Source: over 2 years ago
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