JavaPlanner
DHTMLX JavaPlanner is a new Java calendar control based on the JavaScript dhtmlxScheduler. The JavaPlanner offers multiple useful features and quite simple customization capabilities.
It is pretty lightweight, agile in action and simple in use both for Java newbies and Java guru.
With JavaPlanner you can create attractive Outlook-like and Google-like event calendars and multiple schedulers per page.
Demo samples on seamless integration with Grails, Struts, Spring MVC and JSP are available for download.