Comments in /plugin/IndentAnything.vim read:
Both wrong (I suppose you mean that HTML script?) and highly confusing (which file should I put there? The plugin?).
I have neither used nor looked at this script. However, from the note above, it sounds like this plugin has 2 files. One, the IndentAnything.vim file, sounds like a global plugin that provides functions used by indent plugins which you create. This means you should place IndentAnything.vim in your ~/.vim/plugin directory.
In general, indent plugins all work the same way. First, you need to turn on per-filetype indentation, usually in your .vimrc:
:filetype plugin indent on
:set filetype? to see the current filetype for your buffer, or
--Fritzophrenic 18:48, July 2, 2010 (UTC)