Is there an alternative to Application Switcher with search? On Windows, I've been using Switcher and the one feature that I really like is being able to switch to applications by typing in portions of their title. Is there an application for Mac OS X (10.7) that provides similar functionality?
Alfred (free)


find any application or file
this app will learn and prioritize your searches
system commands and extended features (google search, bitly...)
you can get more powerful features when purchasing the powerpack




Quicksilver (free)


find any application or file
this app will learn and prioritize your searches
lots of free plugins with extend the functionalities


move files
execute bash commands
...





Spotlight (built-in)

...which is part of the OS and be triggered using &#x2318;+space (default shortcut).