After a quick search around for guiding software alternatives and options, I have put together a list of what I understand to be most of the common ones. Please let me know which ones you use.
Current[1] list by order of popularity:
1.
PHD Guiding
2.
Guidemaster
3.
MaxIm DL
4.
CCDSoft
5. Don't autoguide or guide manually
6 (equal). Guidecam that doesn't require software
6 (equal).
Envisage (voted for as "other software not mentioned specifically in poll)
[1] At at 26/7/09