Libraries which can improve UI

[malonso1976]

Hi all,
I hope Halogen will be an alternative to JPivot some day. I read it
is based on GWT and I would like to recommend the evaluation of some
libraries and tools which may accelerate the development and enhance
the user experience:
- Ext-GWT: http://extjs.com/products/gxt/ is a library which can be
used in open source projects and has interesting components such as
grids (would it be fancy to extend them to make a cross-tab component
as a pivot table is) and others.
- Open Flash Charts: http://teethgrinder.co.uk/open-flash-chart/ can
make charts look great.

Please have a look at them, if they can be of any help.

[malonso1976]

About licensing:

Extjs and Ext-GWT were fully open source, now have a mixed license...
details can be found here.

http://extjs.com/products/license.php

and here

http://extjs.com/company/dual.php


A Quick Overview

* If you derive a commercial advantage by having a closed source
solution, you must purchase an appropriate number of commercial
licenses from Ext. By purchasing commercial licenses, you are no
longer obligated to publish your source code.
* If you wish to use the open source license of an Ext product,
you must contribute all your source code to the open source community
and you must give them the right to share it with everyone too.

(PS: I don't work for Extjs or have any comercial relationship with
them)