Coldtags suite provides over 295 JSP custom tags for common programming tasks faced by JSP developers.
Wt (pronounced 'witty') is a C++ library and application server for developping and deploying web applications. The API is widget-centric, and inspired by existing C++ Graphical User Interface APIs. To the developer, it offers complete abstraction of any web-specific implementation details.
Echo2 is the next-generation of the Echo Web Framework, a platform for developing web-based applications that approach the capabilities of rich clients. The 2.0 version holds true to the core concepts of Echo while providing dramatic performance, capability, and user-experience enhancements made possible by its new Ajax-based rendering engine.