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- ---
- title: Overview
- order: 1
- layout: page
- ---
-
- [[addons.overview]]
- = Overview
-
- In addition to the components, layouts, themes, and data sources built in into
- the core Vaadin library, many others are available as add-ons.
- link:http://vaadin.com/directory/[Vaadin Directory] provides a rich collection
- of add-ons for Vaadin, and you may find others from independent sources. Add-ons
- are also one way to share your own components between projects.
-
- Installation of add-ons from Vaadin Directory is simple, just adding an Ivy or
- Maven dependency, or downloading the JAR package and and dropping it in the web
- library folder of the project. Most add-ons include a widget set, which you need
- to compile, but it's usually just a click of a button or a single command.
-
- After trying out an add-on, you can give some feedback to the author of the
- add-on by rating the add-on with one to five stars and optionally leaving a
- comment. Most add-ons also have a discussion forum thread for user feedback and
- questions.
-
- Add-ons available from Vaadin Directory are distributed under different
- licenses, of which some are commercial. While the add-ons can be downloaded
- directly, you should note their license and other terms and conditions. Many are
- offered under a dual licensing agreement so that they can be used in open source
- projects for free, and many have a trial period for closed-source development.
- Commercial Vaadin add-ons distributed under the CVAL license require installing
- a license key as instructed in
- <<dummy/../../../framework/addons/addons-cval#addons.cval,"Installing Commercial
- Vaadin Add-on Licence">>.
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