Spotlight / Alfred
The current version of Spotlight in Yosemite has the majority of the same features as you describe for Alfred. It's much advanced on where it was a year or two ago.
The leader in this class of tool I believe is Quicksilver, although i can't speak to why that is the case as Spotlight has always done all i need it to - i'm not the target demographic for these search-for-anything-anywhere utilities.
Biting the hand that feeds IT
