Database of world cities in Excel format. It is extremely easy to manage because it does not contain too many useless entries that only make it harder to find frequently used locations. It is also reasonably detailed. Yes, there are free databases out there with millions of entries. But if you plan to use them on your website with a multi-level selector script, think again – they will take forever to populate. This database contains no duplicates and has over 70,000 entries, of which about 45,000 are in the U.S. and Canada. At $4.99, it's a total steal! Also available in Excel format.