Live game action is shown in a small desktop window. Select the arrows on either side of the date to pick the previous or next date.
Click on the MLB logo to go to mlb.com. Click the team name to go to the MLB game page (before, during or after the game).
Click in any empty area of the window and drag to move the scoreboard to the desired location on your desktop.
Written in Java to run on any platform.
The intent is not to present every possible statistic. The intent is to use the least amount of screen space. There is no installer. Double click the downloaded .jar file to start the application. (On Unix you will need to set the 'executable' bit).