Is there an alternative to Application Switcher with search?
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).