Windows Live has launched a new Windows Live Plugins websites, a yard of 3rd plugins for Windows Live applications. The website allows you to download and submit plug-ins for Windows Live Photo Gallery, Movie Maker, and Writer.
Photo Gallery plugins include Publisher plugins, to make beautiful, professional-quality photo books, using photos from your Windows Live Photo Gallery.
There are total 177 Writer plugins are available including Microsoft and 3rd party plugins, which can give new enhanced experience to your blogging.
Movie Maker plugins are very limited right now and only Uploaders are available, include Facebook, Youtube and SmugMug.
If you are a developer, this is a right place for you. Microsoft welcomes developers to write plugins and share with your peers. For more details about Plug-in Development SDKs and Submission Process.
I hope you find this new website helpful and will keep enriching your experience with Windows Live Photo Gallery, Movie Maker, and Writer.