HLogoZ Lite is a script that automatically changes a logo or other image for specific holidays or other dates. There is also a version HLogoZ available as a plugin for WordPress: HLogoZ-WP. It allows you to specify your own custom dates or holidays on which the logo should be changed. It has three modes: image, Flash, and text. All modes can be used together.
phpCheckZ is a Web utility that allows you to create dynamic checklists for your Web site. It features an unlimited number of checklists (up to 250 fields per list), an optional chart for each list, a member system, and a bridge system (to use other member systems). You can choose to display checklists on your Web site with a small snippet of code or use the backend as a frontend. phpCheckZ can also be translated to languages other than English.