I know about the Go To -> File... (Ctrl + Shift + N), but is there a possibility to search by a pattern in the filename?
There is a GotoFile plugin for Eclipse (http://muermann.org/gotofile/) where you can use a sequence of characters from the filename for the search (eg. "HW" would match HelloWorld.html). It is very useful when you do not remember exactly the filename, or you have many files start with the same word. You can very quickly find a file just typing a couple of characters even if you only know parts of the name, and not necessarily the beginning.
Has IntelliJ IDEA such a feature? I miss this very much.