Java Calendar Component
- Navigate to week of year. ISO week numbers. Day of year. Null Date. [Commercial, demo version]
- http://www.buglerock.com/calendar/

BISS AWT
- An open-source project rewriting the Java AWT classes. It is like Swing in that it doesn't use the underlying OS look and feel, but instead implements its own look and feel. [Open Source, GPL-like]
- http://www.biss-net.com/produkte.bawt.ueberblick.en.jsp

JClass Elements
- The Essential Set of GUI Extensions and Enhancements. [Commercial]
- http://www.quest.com/jclass/

Java Date Picker
- A Swing component that displays date information and acts as an interface through which users can modify it. [Commercial]
- http://www.jdatepicker.com/

Swing Calendar Component
- Java component for date selection, easy to install and use, skins supported, free demo download.
- http://www.calendarcomponent.com/

Scientific Applications
- A Java GUI library including JTable and TreeTable components. [Commercial]
- http://www.scientific.gr/html/components.html

Java Print Dialog Framework
- A Swing component (JTable, JTextPane, JTree, ...) printing framework. It includes custom Page Setup, Print Preview, and Print dialogs, and the ability to preview and print any Java Swing GUI component. [Commercial]
- http://www.softframeworks.com/products/products.php

Components!
- A collection of components for JFC/Swing includes calendar and calculator controls. [Commercial]
- http://www.jproductivity.com/products/components/

GroupingTable
- A Swing component, allows to categorize data. Users can collapse or expand a row. Provides multi level grouping, MS Outlook style grouping. Allows insertion, deletion and editing of rows in table at runtime. By Daffodil Software Ltd. [Commercial]
- http://daffodildb.com/grouping-table.html

Eltima Visual Java/SWING Components Library
- Powerful set of components for Java/SWING development that supports all Java Look and Feel includes Windows, Motif, Macintosh and adds new styles to buttons, color dialogs, search fields. [Commercial]
- http://www.eltima.com/products/visual-java-library/

LG3D Core Project
- Bringing a richer user experience to the desktop and applications via 3D windowing and visualization capabilities.
- https://lg3d-core.dev.java.net/

MiG Calendar
- A Java component for creating advanced, easy to use and polished calendaring applications and event/activity visualizations. Screen shots, evaluations and documents are available at the product site.
- http://www.migcalendar.com/

Led Ticker Swing Component
- Visual library for usage of led display ticker text into Java Swing applications. [Commercial]
- http://www.ledticker.net/

Java2s
- Provide collection Swing controls. [Commercial]
- http://www.java2s.com

Jeppers
- A grid component that can be used in Swing applications. It part full featured spreadsheet editor written in Java. [Open source, LGPL]
- http://jeppers.sourceforge.net/

Zeus
- A Java Swing components library provides useful components for easier GUI development includes: JConsole, a java console replacement, redirects stdout, stderr; JSplash, a splash screen. [Open source, LGPL]
- http://sourceforge.net/projects/zeus-jscl/

JGUI
- A collection of useful Java GUI (Swing and AWT) components and utilities.
- http://jgui.imagero.com/

Advanced Swing Components (ASC Suite)
- A 100% Swing-based components that help deliver Swing applications with a professional and user-friendly interface. [Commercial]
- http://www.smardec.com/products/asc.html

SERVA TWaver
- A set of Java Swing components for telecom OSS GUI development.
- http://www.servasoft.com

Java MDI application framework
- A MDI (multiple document interface) application framework for Java/Swing with document-view architecture, support for undo/redo operations, clipboard data transfer, modular file i/o, internationalization. [Open source, GPL]
- http://jmdiframework.sourceforge.net

QuickTable
- A DBGrid JavaBean to access database using swing JTable. It features include Print Preview, Printing, copy/paste to Excel. [Freeware]
- http://quicktable.org

ActiveTree Inc.
- Smart JPrint, a 100% Java printing and PDF generation API for any Swing/J2EE applications; Smart JSwing, a Java swing library with custom swing components; Smart JGraph, a Java graph library for workflow, relationship, complex data presentation.
- http://www.activetree.com/

Simprit Swing
- An addon package for Java Swing including JSxToolBarPane, JSxCalendarPane, JSxDatePicker, JSxButton, JSxNumberTextField, JSxDateTextField, JSxMaskTextField.
- http://www.simprit.com/sxswing.html

JGrid
- A grid component with support import/export data in/out XML format. It have built-in cell editors and renderers and support custom editors and renderers. By JBit Software. [Commercial]
- http://www.jbitsoftware.com/JBitSoftware/jgridinfo.html

SmartUI
- A lightweight Java component library for user interface(UI). [Open source, LGPL]
- http://smartui.sourceforge.net/

WebRender
- A Java HTML renderer/browser component.
- http://www.webrenderer.com/

JSyntaxColor
- A library for coloring in real time user text input. [Shareware]
- http://www.japisoft.com/syntaxcolor/

Extreme Component
- A set of Java GUI components including: JDataGrid, JWizardPane, JDirChooser, JLinkButton (a browser launch button), JCalendar. [Commercial, with sources]
- http://www.zfqjava.com/

Java Candies
- An awt component library for Java 1.1. Some of the classes included in the library are: Animated Checkbox, Date Selector, Tab Folder, Image Button, Image Panel. [Open source, LGPL]
- http://javacandies.sourceforge.net/

Wotonomy
- Pure Java UI framework for building both web and GUI applications. Inspired by the NeXT and OpenStep APIs and includes clean-room implementations of portions of the WebObjects and JavaClient frameworks. [Open Source, LGPL]
- http://wotonomy.sourceforge.net/

3Magic Coffee Table
- Optimized Java components to display columnar data on all JDKs, from 1.0.2 upwards. [commercial]
- http://www.3magic.com/products/coffeetable/

LITk - Litteral Instrumentation Toolkit
- A set of Java Bean components that let you create efficient and real-looking GUIs for applications such as data acquisition, instrumentation, supervision, process simulation. [Commercial]
- http://www.litteral.com/us/products/main.htm?litk/info.htm