I often come across interesting apps or maybe scripts that people have written that I'd like to take advantage of. I never do because I am concerned about the safety of running these apps/scripts since they are not coming from apple.com or some other venue of similar nature. For instance, as a recent example, I wanted to install an app, or whatever it is, to make the default mail application use a 3 column layout. The app is called widemail, and I think there was another one that I can't remember the name. So my question is, How do I know if it is okay to install these apps? It seems that widemail is relatively popluar; but what about an app that might not be as popular? Are "all" things on macupdate.com safe? what about versiontracker? How can I decide if I should trust some person's code/script, on my computer?