In 2013, Canonical – the company behind Ubuntu – attempted to raise $32m via crowdfunding for its Ubuntu Edge smartphone. It didn’t make it, but the Ubuntu phone isn’t dead. In fact, development is well under way and the Ubuntu phone operating system is very much alive. If you’re brave enough, you can download and install the developer version on certain Android smartphones and tablets by following the instructions here.
At least, it looks good from the screenshots here, which are from the Ubuntu website.