Nokia X is an Android phone so it is very hack able. An XDA user has been able to install Lewa operating system on Nokia X and judging by its screenshot it is looking pretty slick.
Here are the installation instructions:
1. Download the driver file and extract it to your desktop
2. Download the configuration file and extract it.
3. Download the tool to let you jump into the recovery and extract it.
4. Download Lewa ROM.
Just keep in mind that you will loose all data after installing it so make sure to create a backup before proceeding.