Interactice World Map with Names

Hi,
 
I am building a website where my customer has offices/factories in both US and Asia.
On the website, office location page, I like to put US map and world map where it shows cities where their have their offices/factories.
I googled and found this site, but they are not free.

http://www.imapbuilder.com/map-templates/

I am not necessarily looking for free stuff, but I like to compare this site & their prices against some other products.

If you have some information on alternative products, I would appreciate it.

Thank you.