Want to quickly tell someone else where you are?
Perhaps you and a friend are trying to meet up and you are having
trouble describing your location. There are two free apps that do
little more after you launch them then create an e-mail with the
subject line "I am here" along with a link to Google Maps with a marker on
your exact latitude and longitude so that the recipient can just click
the link and see where you are.
To confuse matters somewhat, both apps are called the same thing: Here I am. One of them comes from Arboretum Software, and was recently reviewed by Macworld. The other one comes from Gareth Townsend. The core features are the same, but they have some slight differences. For example, the Arboretum app lets you set a default "to" address and subject line, useful if you will often be sending to the same person, plus it actually tells you your latitude and longitude before the e-mail is sent. But whichever you choose, both are fast and easy.
As noted, these apps can be useful to show someone else where you are. They might also be useful if you are at a location that you want to remember at a later date -- just send the e-mail to yourself.