Lots of schools have Smartboards, but the software is very bloated and doesn't run well on low-spec class computers:
It's also very expensive.
If you don't need any of the extra features, and just want to write on the board, the Openboard runs much better.
Openboard is also useful for video conferencing and educational screen capture videos.
It would be great for people to be able to run Openboard without having to install it.