Question
I'm looking for a GWT common purpose paging widget. So far I have found GWT widget library and the Google Incubator widgets. Is there any other free (possibly open source) widget library implementing a paging behavior.
Solution
You found the two major ones. The Google Incubator widgets might be a good bet, because the intention is for these to eventually make it into the main library. In general the GWT widget library widgets tend to be fancier, but the GWT incubator library widgets tend to be more modular and also more robust across more web browsers.
OTHER TIPS
GWT 2.1 now ships with paging widgets.
Data Presentation Widgets (Cell Widgets)
I have used the one offered by GXT (A GWT library) and I love it! Check it out!
This GXT library have a commercial lisence!
Actually they do both comerical and quid pro quo
http://extjs.com/company/dual.php
So provided you open source your project you can use it for free.
There is also an example of using GWT 2.1 CellTable
with the AsyncDataProvider
:
http://robin.mytechtip.com/2010/11/17/gwt-celltable-example-using-asyncdataprovider/