PopUpCop by EdenSoft 

Award-winning PopUpCop blocks popups and a variety of other annoyances that, unchecked, degrade the quality of your web experience. This add-on for Internet Explorer version 5 and higher will make your Web browsing experience more tranquil.
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Topmost Clock 

Topmost Clock is a transparent desktop clock, which runs on top of all other windows. It may have a digital or analog clock face of various colors, sizes and shapes. It has flexible settings, which allow customizing the clock.
clock time skin transparent digital analog date desktop