The MoDaCo Switch firmware that was revealed some weeks ago, just left private testing to the current build (beta 8) to the public. MoDaCo Switch allows you to switch between HTC Sense and vanilla Android on the HTC One. Yes it’s that cool, it with an app in the app drawer that allows you to switch ROMs and share apps, and accounts the between Sense and stock. To get this on your HTC One, you should be conversant with flashing custom ROMs and able to follow instructions, to get through the initial setup process. Galaxy S4 (GT-i9505) owners are not left out, as MoDaCo has an Indiegogo project set up to raise £1000 ($1500) to bring Switch to the GS4. To get the MoDaCo Switch firmware on your HTC, hit the link below the break for installation instructions and download link.
Source: MoDaCo