I threw this utility app together last year, in order to keep track of our Internet usage on a time-limited account. This is a piece of software that lives quietly in your menubar, until an Internet connection is detected. Then, it will count how long you’ve been online, showing a timer in the menubar.

Features:

• Detects your Internet connection automatically, or you can start and stop the timer manually.
• Keep a log of your usage, including weekly, monthly, and all-time totals, and daily average, with the ability to reset these.
• Time in configurable blocks of time, if your carrier charges in blocks (e.g., 15 minutes)

Grab it here:

Internet Timer