Martin Wimpress and Rohith Madhavan have made an Ubuntu MATE image for the Raspberry Pi 2 and Raspberry Pi 3 based on the regular Ubuntu armhf base, not the new Ubuntu “Snappy” Core, which means that the installation procedure for applications uses the traditional tools, ie apt-get.
We have done what we can to optimise the build for the Raspberry Pi 2 and Raspberry Pi 3, you can comfortably use applications such as LibreOffice and Firefox. But the microSDHC I/O throughput is a bottleneck so we highly recommend that you use a Class 6 or Class 10 microSDHC card. Ubuntu MATE 16.04 also fully supports the built-in Bluetooth and Wifi on the Raspberry Pi 3 and features hardware accelerated video playback in VLC and hardware accelerated decoding and encoding in ffmpeg
You’ll need a microSD card that is 6GB or greater. The file system will be automatically resized, on first boot, to occupy the unallocated space of the microSD card.