Kaluach for Windows, Kaluach Kaf, and KZmanJS all display halachic times based on the users location. The default location is Jerusalem, but this can be changed easily. Built-in lists offer common alternatives. If the location that you want is not found in these lists, you will have to find the coordinates for your desired location elsewhere.

Most world atlases have the coordinates noted next to the location in the index. If you don't have an atlas, or your location isn't in the index, you can reference the geographic location resources page on this site. Don't forget to also enter in the UT offset. This is the same thing as the time zone. For information on time zones, refer to the resources listed on the time zone page.