TYPO3 CMS is a Web Content Management System which features automatic creation of navigational menus, headlines, and other dynamic graphical elements, automatic conversion and scaling of images, the ability to present different templates based on variables such as client browser or country code, support for multiple templates on a site, and a built-in password-protection option. Pages can be timed to be shown on a certain date, be hidden on a certain date or just temporarily hidden. TYPO3 supports search in SQL-databases and redesigning of a website at once is just a matter of creating a single new template.
Urd is a Web-based Usenet binary download manager. It stores the newsgroup information in a MySQL database and aggregates the articles into sets of a single download (e.g. one album or movie). The Web interface can be used to search with regular expressions. It uses its own downloading daemon that has support for scheduling downloads and updating databases. URD can also download directly from NZB files and even create NZB files. Further features include custom scripts, multiple languages, a template based Web interface, support for multiple servers, automatic par2 and unrar support, and an intuitive user interface.
UvumiTools Dropdown Menu is a cross-browser, fully degradable, unobtrusive dropdown menu plugin. It is very easy to use and simply adds features and functionality to existing HTML on your site. It turns a basic unordered list into a very nice and sturdy animated horizontal drop- down menu.
Compare Ikea Prices is a Firefox addon that displays prices from Ikea stores in other countries and converts the prices to Euros. It works for most Eurozone countries. After installing, it has to be turned on by checking an "Enable price comparing" checkbox in Tools > Compare Ikea prices.