Just to let everyone know that you can now use Lyo Designer (and generator) as a standalone application.
See installation instructions: https://oslc.github.io/developing-oslc-applications/eclipse_lyo/install-lyo-designer.html
Lyo Designer is still available as an Eclipse plugin (for those that want it integrated with their Eclipse IDE). But if you want to avoid the hassle of plugin dependencies, the standalone application would provide the smoothest experience.
While at it, I would be very interested to know if anyone is actively using Lyo Designer. And if you want to share your experiences with me.