From My Symbian Geominder for Series 60
Geominder by Ludimate allows you to create location-based reminders that stay attached to physical locations.
When arriving at a marked location, Geominder can play an alarm and display a stored text note or a voice note previously associated to the location.
Geominder uses mobile network's cell id information and doesn't require an extra GPS device.
A location-based reminder can be much more convenient than standard time-based reminders - for example:
"When I arrive at the office, remind me to review next week's schedule"
"When I pass supermarket, remind me to buy vegetables"
"At home remind me to call Dave