I was notified that ComeOn! was discussed here. I'm the author :-) Thank you for your intereste in my humble tool.

ComeOn! used to work with OpenJDK. I did not check lastly though, but it has no dependency on Oracle's proprietary parts of the JDK and works with Oracle's JDK 8. Java Web Start might be a pain 

I'm aware the most interesting part of the documentation part is missing. It was not such a problem as long as I was the only user, but times are changing. I'll do my best to write this part soon, but time is the critical resource. I'll try to send you later an exemple of how to use the feature.

BR,

Édouard