AJAX is an approach to writing web pages that improves a web site's appeal and usability. It enhances user interaction by targeting updates from the server to specific areas of the web page. It allows information to be changed without long delays or frustrating page refreshes.
DWR reduces development time and the likelihood of errors by providing commonly used functions and removing almost all of the repetitive code normally associated with highly interactive web sites.
DWR is freely available as open source software (ASL version 2.0). It is straightforward to implement with extensive libraries, examples and tutorials. Incorporating it into existing sites is simple as it readily integrates with the most commonly used Java frameworks.URL: http://getahead.ltd.uk/dwr/
Licence: Apache License