Not only Cezanne looks great, it also allows you to combine
the custom LAF with e.g. Nimbus:
The WebStart Demo works perfectly on Mac.
The real application looks actually better, than the screenshot above :-).
NEW: Online Workhop Effective WebApps without Frameworks is also coming to: MUC Airport.
Airport MUC workshops: Web (SPA, PWAs, Offline, Desktop, Mobile) Applications Essentials and Effective Web Applications. No migrations. #usetheplatform
Podcast: airhacks.fm and newsletter: airhacks.news
A book about rethinking Java EE Patterns