BubbleTimer
Bubbletimer is a web application designed to help you track your activities in simple units of 15 minutes. The application displays an interactive chart dividing the day vertically into 15 minute units and horizontally into activities. Users can record time spent on each activity on the chart, and the application indicates how the totals compare to daily and weekly goals.
The application is available for a 14 day free trial, after which an annual fee is required.