learning content authoring

Free

LessonWriter by Lesson Writer
From what we can gather from their website, LessonWriter is a tool for teachers that allows them to create lessons from any passage. These courses allow teachers to be creative with their lesson plans and also saves them a great deal of time.
http://www.lessonwriter.com/

Classtools
Create  games, quizzes, diagrams and activities
http://www.classtools.net/

The Multimedia Learning Object Authoring Tool by Tim Wang, John Bratlien, Liang Shao
The Multimedia Learning Object Authoring Tool enables content experts to easily combine video, audio, images and texts into one synchronized learning object
http://www.learningtools.arts.ubc.ca/mloat.htm


Cost

Quia

www.quia.com

Create your own educational games, quizzes, surveys, and web pages. Search millions of games and quizzes created by educators around the world

Articulate Storyline 

https://www.articulate.com/products/storyline-overview.php

Create polished interactive courses with Articulate Storyline, the only e-learning authoring software that grows with you