The plug-ins are one of the most useful additions to various Windows Live products. These enhances the usefulness immensely. Now a new , neat , clean revamped site has been created featuring these plug-ins.
Windows Live Plug-ins

For various Windows Live App , it provides many plug-ins arranged category wise, tag cloud and languages which can be arranged in various ways making it very easy.

Check out the various plug-ins at Windows Live Plug-ins