Random Executor

Random Executor is an app for randomly selecting a file from a directory you specify and opening it in using the default application for that file's type. You can optionally specify name rules that have to be met to narrow down the selection of files that may be opened.

For example: You've got too many movies to watch and need to pick one at random otherwise you'll never decide. You open Random Executor and select your movies directory then configure filename restrictions to avoid playing movies you have already seen, or restrict the movies to one which contains a particular word, and define file types to avoid such as image and subtitle files, then click Go! Friday night sorted.