For those of us who rather not use Wintel boxes there are two PDA options:
Decoweenie+ for the Palm OS calculating OC/CC using Bühlman ZHL-16 B or C, Pyle, GVE, GF or DCAP.
Has a myriad of options.

Visit website, about half way down the page is a link to ADM's Fall 2003 article comparing deco softwares.
GAP-Lite for Pocket PC, also calculating fO2/pO2 but using RGBM or Bühlmann ZHL-16 B and C.
