Most of these have limited content and are of marginal interest. Those below are worth going to, however. These sites are particularly good on the history of Antarctic exploration. An excellent chronology of Antarctic exploration from the philatelists. These sites concentrate on individual explorers.
Most tour operators have their own websites.
Some sources for webcam views from various stations. Some good photo images of Antarctica including some that are in the public domain. James H. Barker. Photographic documentation of the people of Antarctica. Exhibitions at galleries.