Pieforms provides a simple, unified way to create, validate and process forms all with a common look and feel, with support for pluggable elements, renderers and validation rules. Supports AJAX submission, date picker/other advanced controls. PHP5+.
OsisForms: An OO component library/framework for creating and organising web forms. The aim is to make form building more enjoyible and productive. OsisForms Written in PHP (5), with accompanying JavaScript and CSS libraries and extensive documentation.
A relational database record editor/viewer which automatically links tables and gives users options for link fields. Allows editing of all tables and records in the database. Based on PEAR's DB_DataObject_FormBuilder.
The JavaScript Object Notation (JSON) is a simple and lightweight data interchange format. This project provides PHP libraries for manipulating JSON objects. For more information on JSON, visit http://www.json.org/