Ariba made it big through the last dotcom boom/bust with procurement services via the web for B2B; they (quietly) open-sourced a web development framework (that they've developed continuously since 1999) last summer (AribaWeb) and now it's come to my notice - e.g. they claim 100 times less code than Rails, never mind JSF, Tapestry, Struts2, etc.

Live, in the browser editing of the presentation artifacts is one interesting feature; it's all based on JEE and has an ORM layer over top of Hibernate (something like Grails has i.e. GORM). Read all about it here.

P.S. Somehow Kirk beating the Gorm is still one of my favourite (cheesy) sci-fi scenes; how about you?