Ruby on Rails leads the AJAX charge with outstanding support out of the box. And given the incredible hype surrounding Ruby on Rails, you could be forgiven for thinking that if you wanted to use AJAX, you’d pretty much have to use R-on-R.
Thankfully for old WebObjects developers like myself, that is not the case.
Using the Metaparadigm JSON-RPC bridge Jean-François Veillette built a framework that provides AJAX support for WebObjects applications and released it into the wild. Anjo Krank wonderized that and included it in ProjectWONDER and Mike Schrag has done some great work extending it by adding additional components.