Hello again, Henry!
Serif PhotoPlus 6 would top many people's lists of suggestions:
http://www.freeserifsoftware.com/software/Phot oPlus/default.asp
Google's Picasa software is also popular:
http://picasa.google.com/
GIMP is probably less easy to get to grips with than either of those programs, but it's the nearest thing that you'll get (for free) to Photoshop:
http://www.gimp.org/
Irfanview is probably best known as an image-viewing program, rather for image-editing, but it's got some useful features for manipulating your pictures. (e.g. it's one of the best programs I know for getting rid of 'red-eye'):
http://www.irfanview.com/
Chris