From Kaylon Technologies:
Powermarks allows users to avoid the entire folder and hierarchy system, yet still create, find, and browse large collections of bookmarks. Powermarks works with all the popular browsers: Netscape, IE, Mozilla, Opera, and NetCaptor. It includes notes, descriptions, and keyword fields for each bookmark. It has flexible import and export capabilities, synchronization with browser bookmarks, autosave, undo, macro, copy and paste, and global hot key features. It also has intelligent Web page status checking, proxy and HTTP 1.1 support, and more. In addition to the IE toolbar, this update includes two configurable system tray icons to enable easy integration with Netscape, Opera, NetCaptor, and Mozilla.