Here is the periodic sampling from my del.icio.us favorites list. This time I chose the tag "Authoring." Here's what I found I have:
Nvu: Nvu (pronounced "N-view," for a "new view") is a free, open source software program that allows you to build websites and web pages using a simple WYSIWYG editor (what-you-see-is-what-you-get). Nvu makes creating web pages as easy as using a word processor and rivals such programs as Adobe's Dreamweaver and Microsoft's Expression Web, only for free! With Nvu's built-in site manager, connecting to your website and making changes is a snap.
Udutu: A free online course and simulation authoring tool.
CourseLab: CourseLab is a powerful, yet easy-to-use, e-learning authoring tool that offers programming-free WYSIWYG environment for creating high-quality interactive e-learning content which can be published on the Internet, Learning Management Systems (LMS), CD-ROMS and other devices.
eXe: Open Source authoring / HTML editing application to assist teachers and academics in the publishing of web content without the need to become proficient in HTML or XML markup. Resources authored in eXe can be exported in IMS Content Package, SCORM 1.2, or IMS Common Cartridge formats or as simple self-contained web pages.
A post from the Learning and Performance blog on authoring elearning for the iPhone.