Colango is a product built together with blended learning teachers from Korea, US and UK through multiple pilot projects and beta testing, and it is now used by blended learning teachers all over the world.
Colango has also a webapp, check it out: http://www.colango.com
On Twitter: @colangoapp
On Facebook: https://www.facebook.com/colangoapp
By Email: firstname.lastname@example.org