Commercial interactive whiteboards such as Smartboard (Wikipedia entry), ActivBoard, Interwrite Board, Mimio and eBeam are usually bundled with educational software. The DIY Wiimote based interactive whiteboard (some call it Wiiboard) is however developed in an open source community and therefore software that can be utilized has to be search around.
Jarnal is an open-source application for note taking, sketching, making a presentation, annotating a document or collaborating using a stylus, mouse or keyboard. There are versions for Windows, Linux and Mac, all found in the download section.
The video below is for KindleLab. There are versions for Windows and Mac. Linux user can use the program as well through Squeak. Install Squeak by searching for Squeak in the Synaptic Package Manager. Download the Windows version and extract . Start a terminal, go to the folder which has the file 'kindlelab.image' and run 'squeak kindlelab'. KindleLab is basically a paint program together with a web browser.
The video below is for EduSim 3D. Only alpha version is available. I am not too sure how is the 3D environment going to help kids in e-learning.