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Full user review
"Best Widget engine used"
Easy to get started
Light on system resources
Documentation would be helpful, especially for the programming parts
The original review sounds a bit harsher than it should have been. The dock, for instance, only appears on demand.
And the default widgets may seem a little limited, but there are plenty of new and innovative widgets on the Xwidget site and on DeviantART.
I have tried Yahoo Widgets (now retired) and Microsoft's Desktop gadgets, and this application appears to use about 10% of the system resources of Microsoft's offering.