An OS for Raspberry pi that does not corrupt the SD card?
Untested by me
IPE R2 – Industrial Perennial Environment Release 2 aims to be a blackout-proof Linux distribution-alike for the Raspberry PI. It is based on buildroot, and available both as an Image and as an SDK, where you can compile your own Image.
Read more: Link - IPE R2 | NutCom Services, Inc.