I have listed a few selected content author tools for content development.
1) Joomla – web based tool. I have designed website a few of my websites with Joomla.
2) Captivate – I really love it for building up some urgent course materials in a short span of time.
3) Articulate – I have used this wonderful tool for one of my clients. The productivity was amazing.
4) Moodle – It is a fantastic tool for web based courses.