Vim 8 added a native way to load third-party packages. This means, for me at least, there is no longer any need to use a third party plugin helper like Pathogen.
Tutorial on using more, a UNIX and Linux command for viewing the contents of a file or files one screen at a time. Examples of viewing a file, viewing multiple files, searching using regular expressions and opening the file in a text editor.
Vim's netrw file browser is good enough. With a few tweaks there is no need for plugin like NERDtree. For many tasks you may not even need netrw.