Ardesia is a digital sketchpad for your desktop. It enables you to make colored free-hand annotations with digital ink everywhere on your desktop, record them, and share on the network. Ardesia is a easy-to-use, simple, and useful application, especially for those who often make a presentation or lesson to another by showing the computer screen. You can annotate, mark, highlight important objects on your desktop with Ardesia. This make your lesson easier to understand by your audiences.

I have tried this application long time ago when I used Ubuntu Natty (as shown in picture above) and it did well. Recenty, I tried Ardesia on Ubuntu Oneiric and it still worked great!

Install Ardesia on Ubuntu
In fact, Ardesia is available on Ubuntu repository, but it doesn't work on Ubuntu 11.10 Oneiric Ocelot due to a dependency issue when installing. Alternatively, you can download the *.deb package here and run these commands to install Ardesia on your system:
  • sudo dpkg -i ardesia_1.0-1_i386.deb
  • sudo apt-get -f install
Replace "ardesia_1.0-1_i386.deb" with your exact file name of Ardesia *.deb package.

For additional information, below is a demo video about Ardesia:

Enjoy :)