PHP CLI Framework is a simple class which you can extend to quickly create a commandline (CLI) application using PHP. Only a single file is needed, and everything extends that file. It supports interactive input and an object oriented way of writing which keeps things nice and clean. Features include arguments, flags, options, colors, interactive input, object oriented PHP5, a micro framework, and minimal coding required. There's only a single class to extend.
H2o is a template engine that offers an enjoyable template authoring experience for PHP. It encourages clean and readable template syntax, a compact, extensible template engine, and a very clean code base. It supports template inheritance, duck-typed variable lookup for PHP objects, a useful set of bundled tags, and filters and extensions for strings, HTML formatting, and internationalization.
pClosure can be used to create closure functions that work with any PHP 5 version. It uses a lambda function to enclose the closure object for simple execution. Additionally, it supports scalar type hinting and the ability to change execution scope of the closure object using a supported interface.
phpDays is a flexible PHP 5 framework for rapid Web site development. It features an MVC architecture, Ajax support, YAML configuration, database abstraction (MySQL, PostgreSQL, MS SQL, etc.), a good collection of standard models, an excellent quick start guide, and logging to files or firephp.