Per Diem Calculator
http://www.perdiemcalc.net/va-restructured-pr/

International Per Diem - Part 1
https://aoprals.state.gov/web920/per_diem.asp 

International Per Diem- Part 2
https://aoprals.state.gov/content.asp?content_id=114&menu_id=78 

Hawaii, Alaska, and Puerto Rico Per Diem
http://www.defensetravel.dod.mil/site/perdiemCalc.cfm 

OANDA Foreign Currency Converter
https://www.oanda.com/currency/converter/

Zip Code Finder
https://www.zip-codes.com/

Google Maps
https://www.google.com/maps

Rental Car Class Cheat Sheet
http://www.bussvc.wisc.edu/acct/policy/travel/rental_car_abbreviations.pdf