The RichFaces project is an advanced UI component framework for easily integrating Ajax capabilities into business applications using JSF.
RichFaces 4 builds upon the pioneering Ajax support that began with RichFaces 3 and is standardized in JSF 2. In addition to extending these ajax capabilities, RichFaces also improves other areas of JSF 2, including usability, performance tuning, dynamic resources, skinning, and component development. This allows users to take full advantage of all the productivity enhancements of JSF 2.
It is my favorite web framework and component library for developing web applications.
It is simple to use the components and to combine them into personalised components.
You are very efficient for building big and very complex web applications.
It as a uge community and the documentation fits perferctly for what I expect for an open source project.
The project has also given an enormous new experience for JSF 2.0 (with ajax and fecelets)
Really good component library. This one has existed for quite some time and suffers from some minor legacy issues, but nothing really serious. Could be a tad more innovative, that's why I gave it a 9 and not a 10, but still a very good project.
Good alternative to PrimeFaces and can, if you really want to, even be used together with PrimeFaces to create and even larger pallete of components for JSF.
There is one thing that renders this framework unusable - bugs. There is hundreds of registered bugs, but versions still get released with no fixes. They are not showstoppers but my team was able to find bugs in most of the major components. Some are JSF related (like ViewScope, which is useless for a full year now without a fix), some make you abandon the intuitive path for workarounds and hacks. Showcase may look good but a few months into development I am all for abandoning Richfaces and JSF in favour of anything else.
There's nothing good about richfaces - bugs in components, poor community support, overengineered components, old jQuery, skinning issues. Don't use.