For some reason Golf apps are popular with BlackBerry users and GPS Golf Range Finder by Swing by Swing will probably do well. The free app gives you all the critical range finder information you need on your BlackBerry free. This includes course maps, scorecards, and distance to the hole. You can even do cool things like view a satellite photo of the course to see what you are up against.
So far it only officially supports certain devices but I have heard reports that it works with some unsupported devices. If you are in the market for a GPS Golf Range Finder you can download this app OTA by going to this link or read more about it at www.swingbyswing.com