RainFramework is an MVC Framework for PHP. It's easy to use and it enables teams to work better. It is installable with a simple copy/paste operation. It has a very small footprint, with just the necessary library and files. It is well documented and tested, and it allows you to create Web applications more quickly. It also supports multiple languages, has a WYSIWYG editor, and is extensible.
tilswiki is a wiki engine that is always in edit mode. Any user can always click in the content area and start typing. Its intention is to be the radically easiest possible publishing tool. Its feature include basic text formatting, image uploading, resizing, and positioning, HTML, security through unguessable page URLs, customizable page URLs, and email notification on changes.