Screencast-O-Matic is a new web-based screencast program that is incredibly easy to use. And since it uses a Java applet, it runs on Windows, Mac, and Linux machines.
BitNami bundle many popular Open Source software packages into a 1-click setup file. Theoretically, all a user has to do it download the package of their choice and copy it on to their system or web host.
CoveritLive's web based software publishes your commentary in real time like an instant message. One-click publishing lets you add polls, videos, pictures and audio clips instantly, and take questions.