Baby Centre - www.babycentre.co.uk
Good general info for parents and parents-to-be with email newsletter tailored for the age of your child or your due date.
Baby World - www.babyworld.co.uk
Similar to Baby Centre but includes a surprisingly accurate gender predictor if you're expecting. If you're already a parent, have a look to see if it was correct.
Baby Chaos - www.baby-chaos.co.uk
Chaos in the title but the website is anything but. A growing but already comprehensive source of non-patronising information from pre-pregnancy to the first year of life.
NCT (National Childbirth Trust) - www.nctpregnancyandbabycare.com
The NCT has many local groups which can be contacted through this website. I recommend the nearly-new sales (but get there early) and the ante-natal classes which mostly happen in the evenings (again, book early).
Just 4 Parents - www.just4parents.co.uk
Offers a range of parent coaching services including for dads and dads-to-be. Also runs activity weekends for fathers and sons in the New Forest (UK).
Frugal Dad - www.frugaldad.com
From the site: "A resource for the average family to find financial resources with a conservative slant." That's conservative in the financial sense, or rather financial common sense.