OpenCustomer is a Web-based customer relationship managment (CRM) application, using Mysql and Java/Tomcat. (Online Demo available)
JWebCalendar is a multilanguage Java JSP/Servlet webapplication. It's intended to provide a Webbased Group Calendar, supporting multiple Users. Users can manage their appointments, invite other users , get email notifications, view other users's calendar
dotCMS is a Java based Open Source Content Management System (CMS).
DotCMS is a free software / open source web content management system (WCM) for building/managing websites, content and content driven web applications. DotCMS includes features such as support for virtual hosting, WebDav, structured content, clustering and can run on multiple databases PostgreSQL, MySQL, MSSQL and Oracle. It also includes standard WCM features like page caching, templating, and an API. There are a number of features and modules in dotCMS, including RSS feeds, AJAX calendar, a reporting engine, news listing, blogs, forums, user tracking and tagging, built in search engine and language internationalization to name a few.
The generic Calendar (gCal) is a web 2.0 based schedule. It uses the gCal library which can be used in other applications, too. It features a user / group based schedule with sharing options and is capable of exporting information to a variety of formats.