Going from the United States to:  

Egypt: http://www.traveldocs.com/eg/vr.htm

United Kingdom: http://www.usembassy.org.uk/ 

India: http://calcutta.usconsulate.gov/ 

South Korea: http://south-korea.visahq.com/ 

Mexico: http://www.mexonline.com/visa.htm

United Arab Emirates: http://www.traveldocs.com/ae/vr.htm

Nepal: http://nepal.usembassy.gov

Netherlands: http://www.traveldocs.com/nl/vr.htm

Pakistan: http://islamabad.usembassy.gov/ 

Turkey: http://ankara.usembassy.gov/

Going from Canada to: 

United Arab Emirates: http://guide.theemiratesnetwork.com/living/visa.php

United Kingdom: http://www.canada.org.uk/ 

Mexico: http://www.canada.org.mx/ 

Going from United Kingdom to: 

Australia: http://www.britaus.net/ 

Singapore: http://united-kingdom.visahq.com/

Going from India to:

Canada: http://www.hciottawa.ca/ 

Germany: http://www.visatoindia.com/indian-embassy-in-germany.html

Hungary: http://www.indianembassy.hu/ 

Peru: http://www.indembassy.org.pe/ 

Going from Hong Kong to: 

China: http://www.travelchinaguide.com/embassy/visa.htm

Going from Australia to: 

Canada: http://www.ahc-ottawa.org/ 

Israel: http://www.passportvisaexpress.com