GFork

Ever wanted to save a list of users on a page, event, group, list of likes, or mutual friends list as a Facebook List without having to type in each user by hand?
Now you can.
Go to any page that shows a list of friends or users (may have to refresh page if loaded by FB's ajax), type a name and click Save List.
Then go to your Facebook Lists page (Here) and click Load List.

You can use Facebook Lists to hide posts from certain users, invite them to events, see a feed of their posts and more.