CCDStack, Photoshop CS w/ the Fits Liberator plugin and
GradientXTerminator and Noel Carboni's actions.
StarSpikes Pro was used to
restore and sharpen the normal spider defraction spikes.
PixFix32 (pre-beta) to
repair hot/cold pixels and column defects.
CCDStack to calibrate, register,
normalize, data reject, combine the sub exposures & RGB color.
PhotoShop for LRGB