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This system tray application measures the download speed of your connection to the Internet by downloading and discarding a text file and timing how long this takes. Right-click the head of 'Technojeeves', that you should see in your system tray (it might at some point go into 'Hidden Icons') to activate and choose the 'Display' option from the menu.
You can monitor your download speed continuously by clicking the 'Repeat' box and you can select the repeat interval by clicking on the drop down list. The average speed will be calculated if you click the 'Average' box.
Why is the application signed? Two reasons:
In other words, this application is perfectly safe and won't harm your system in any way.