In web terminology, an "Index of" refers to a directory listing on a web server. When a website administrator fails to disable "directory browsing," the server displays a simple, text-based list of files and folders instead of a formatted web page (like an HTML homepage). For example, visiting http://example.com/videos/ without an index.html file might show you a raw list of all MP4 files in that folder.
The phrase "Index of Colombiana" typically refers to a directory-style search used to find downloadable files of the 2011 action movie Colombiana , starring Zoe Saldana. Index Of Colombiana