The Copyright Plugin automatically keeps your WordPress page copyright notices up to date. It insures that the copyright notice for each page (be it a single page or an index) includes the earliest date of publication as well as the current date.
AdIcons shows customizable icon-ads on your web page and lets users submit their own ads.
TimeZoneCalculator calculates different times and dates in timezones with respect to daylight saving on basis of utc.
cforms offers convenient deployment of multiple contact forms throughout your blog or even on the same page.