Caucho's Resin is Java EE 6 WebProfile certified. I already smoke-tested resin before the certification - it worked well. Resin comes with own CDI (JSR-330) implementation "CanDI". Parts of the server are even implemented with CanDI itself...
Resin is opensource and free, but you can buy support as well.
Web Apps, SPA, PWA with vanilla Java Script (ES 6+), CSS 3 and WebStandards only. As simple as possible, but not simpler. See you at: (Progressive) Web apps, Single Page Apps and WebStandards airhacks workshops at MUC airport, Winter Edition
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