Looking for a water reflection paint.net effect plugin, then you have come to the right place. This Water Reflection plugin is configurable and easy to use for paint dot net.
Paint.NET saves ICO files with a Plug-IN that expands the FileTypes for Paint.NET. You can open, edit and save ICO files with Paint.NET with this addon.
You can edit PSD files in Paint.NET with the Paint.NET photoshop plugin that allows Paint.NET to edit or save as photoshop PSD format.