Hard Mode is a plugin which disables the arrow keys, the hjkl keys, the page up/down keys, and a handful of other keys which allow one to rely on character-wise navigation. The philosophy behind Hard Mode is that you'll never master Vim's advanced motion and search functionality if you can fall back on the anti-pattern of fumbling around your code with the arrow keys.
To enable it:
:call HardMode()
To disable it:
:call EasyMode()
To enable it by default, add this to your vimrc:
autocmd VimEnter,BufNewFile,BufReadPost * silent! call HardMode()
You may also wish to add the following to line to your vimrc:
nnoremap <leader>h <Esc>:call ToggleHardMode()<CR>
With that line added, presuming your leader is still the \ key, you
can toggle Hard Mode by pressing \h while in Normal-mode.
If you don't have a preferred installation method, I recommend installing pathogen.vim, and then simply copy and paste:
cd ~/.vim/bundle
git clone git://github.com/wikitopian/hardmode.git
Once help tags have been generated, you can view the manual with
:help hardmode.
Matt Parrott and Xeross
GPLv2