I have to build some e learning courses for my project. I have already tried articulate storyline and easygenerator. Can I have some suggestions on other authoring tools that I can use freely to build clean e learning courses.
Articulate Storyline is the best tool ever for building responsive elearning courses.
Along with Adobe Captivate and easygenerator are good tools for this purpose.
Adapt Learning is a new framework to publish web based interactive courses.
My personal suggestion is "Articulate Storyline 2" and it is based on the fact "Chose the software/ tool which have maximum online help by forums / blogs / and other resources" and my experience is that Articulate storyline has greater online help than others.
you can find this also helpful http://elearningindustry.com/the-ultimate-list-of-html5-elearning-authoring-tools