Tripcatcher - Tripcatcher is a mileage app to keep track of travel expenses.
TravelPerk - Corporate Travel Management
Notilus - Notilus offers business travel expense management solution.
Egencia - Egencia is a corporate travel management system.
Traxo - Traxo is a online travel tool that helps users automatically create and keep travel itinerary up-to-date.
Concur - Automated travel and expense management - your employees, travel managers and finance, too.