Originally posted by paulh
Yes, the newer builds of RawTherapee support pixelshift, although I have not used it myself. Free & open source software.
The user interface in RawTherapee is much worse than PDCU, and that's saying a lot given how bad the UI in PDCU is.
I also achieved much better results in PDCU than RawTherapee. That's probably because I can't figure out the right knobs to turn in RawTherapee. Very powerful, but too complicated. PDCU results are mostly right out of the box.
I wish Lightroom had this feature built in. Or there was a PDCU plug-in for Lightroom.
Lightroom can't process any motion in PixelShift, making it not so useful unless you are using a tripod.