We haven't been able to keep the open source ScrumDo up to date and it's fallen a few years behind.
You can find the full featured, commercial version at ScrumDo.com
Find ScrumDo helpful? Want to help us offset our development and hosting fees?
The best way is to get the project via GIT on GitHub:
git clone https://github.com/ScrumDoLLC/ScrumDo.git
Or you can download a packaged version of the master branch: