For those that have not been following the news Paul Oâ€™Brien over at MoDaCo has given us a whole new dual booting concept for the HTC One (initially) that allows us to boot into both Sense and Google Experience roms but here is the kicker - share data! Â This means that you can switch rom and continue to use your apps as if all you have done is reboot the device.
After a closed beta period (in which I was the first Guinea Pig) Paul has now opened the beta up to anyone with a HTC One willing to give it a try.
You can find installation instructions and download links here -Â http://www.modaco.com/topic/363797-modacoswitch-beta-8-support-topic/
Please read instructions before flashing!
EDIT: There is now an indigogo project for the S4, if you own and S4 or simply want to contribute to the Switch project then please consider donating -Â http://www.indiegogo.com/projects/modaco-switch-for-the-galaxy-s4-i9505