FareCatcher: Charityware from Spitting-Image Software. Proactively goes to the web to retrieve the lowest price fares for trips on the dates that you request.
PlanetWare Travel Encyclopedia: Offers comprehensive, searchable tourist attraction data and encyclopedia. Plan travel using 3,000 photos, 2,000 maps, 50,000 in-depth descriptions. A tool for professionals.
Time Traveler: Class Action provides handheld computer software for business travelers.