RCDefaultApp is a free utility that Creativetechs has started adding to our recommended Mac OS X installs. It adds a special preference pane that allows you to quickly change the default application for many common situations:

• Open all your .pdf files in Acrobat instead of Preview.
• Pick a different default mail client or web browser.
• Control what opens when digital cameras or webcams are plugged in.
• Close security holes with how certain weblinks are handled.

Of course you can change these settings other ways. But RCDefaultApp makes it much easier by putting the most requested controls into one location — a new “Default Apps” option at the bottom of your Mac OS X System Preferences.