Overall Course Design
Instructional Design, Illinois Online Network
An ever-changing collection of articles related to teaching online (including Tip of the Month), basic resources, and spotlight issues. As this site is well-maintained, it is worth occasionally checking in to see if new material has been added.
Creating Online Courses, University of Washington
Takes you through the process of creating an online course - from initial planning through action plans for implementing your course. Includes links to relevant resources used throughout the process.
Course components, University of North Carolina at Wilmington
Provides suggestions for how to design the elements of your course's main page.
Online course syllabus suggestions, Dallas County Community College
While this site is focused on issues related to Dallas County Community College, it does present excellent ideas for creating syllabi for online courses. Additionally, Faculty Resources (linked from the bottom of the page) provide some useful tools for online instructors.