From G&G Software:
RSSme is a user-friendly RSS editor. Support creation and editor of RSS feeds. It implements visual and user-friendly editor of posts. Features include simple creation and management of post from dockable bar, user-friendly and visual editor of posts, support for plain HTML tags, support for insertion of images on WYSIWYG-mode, preview of HTML code, and quick validation RSS feeds on official web site of W3C.