The vim-startify plugin provides a useful start screen when Vim is started without any files. By default, it shows a list of the most recently used (MRU) files of Vim. This file list can be navigated using j-k and file under cursor can be opened by pressing Enter. vim-startify can also be configured to show sessions and bookmarked files.
To get back the Startify opening screen anytime in Vim, type the command
Tried with: vim-startify 1.6, Vim 7.3.429 and Ubuntu 12.04 LTS