The release of Alfred 0.9.9 has added a feature for users with experience in Apple Script, Shell Script, and Automator to extend Alfred capability beyond what it can do. If you’ve made a switch from Spotlight to Alfred, I hope this list adds another reason for you to get Power Pack upgrade. Even without Power Pack, you should also try Alfred.1
Flush DNS flushes DNS.
Rebuild Open With… is an extension that can solve your problem with Open With… item lists. Some apps still exist in the Open With… item lists even after uninstallation. This extension rebuild the item association list with all existing apps.
Toggle System Files lets you show and hide system files that are usually hidden.
You can download all the extensions above using the link provided below. I’ve replaced some of the extensions icon. If you know the owner of the icon, please let me know so I can properly credit the icon owner.
Download: Extension Pack