There were already a lot of development for Redmi 1S including CM11 and CM12 but now making Kernel Sources public it opens the doors for a lot more 3rd party development than what had been possible up to now. You can find link to the kernel sources below plus the post where Xiaomi made this announcement. Redmi 1S Kernel Sources o GitHub Source : MIUI Forums Custom ROMS For Redmi 1S :
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