Salient Points  Ryan Gearing's WW1 & WW2 info-zone, one of the best there is!

Noel Chavasse. The double VC story.

Spartacus Educational. An excellent WW1 Encyclopedia.

Trenches on the Web. The most comprehensive WW1 site.

Armourer Magazine. Militaria etc.

The Western Front Association. The organisation for those with a serious interest in the Great War.

The Great War. A great site, very well produced.

New Zealand in the Great War. "From the uttermost ends of the Earth".

Veterans Affairs Canada. The Official Canadian Government Site.

Tommies Guides Dedicated online & mail order bookseller & publisher for WW1 & WW2 titles.

The Old Contemptibles Website.  Brilliant website from Paul Hinckley, an ex-soldier paying tribute to the old soldiers of 1914. Lots of interesting and practical info about visiting the Western Front.