Traveler tracking specialist Voyage Manager has launched four apps aimed at corporate travelers to complement the web tools it provides for travel, finance and HR managers. Voyage Tax shows travelers their up-to-date international and state tax residency data, including the number of days they've spent in a location and the number of days that remain before they become tax-resident. Voyage Immigration shows travelers how long they have left on their passports and visas. Voyage Vault gives travelers access to digital versions of key travel documents like passports, visas, travel insurance policies and driver's licences and alerts travelers when any of these documents are set to expire. Voyage Manager's fourth new app, Voyage Expense, is an expense reporting app.