(I do not use LaTeX-Box any more. Just to keep a clone of the inline maths completion feature that I develped during my PhD.)

LaTeX-BoX

This plugin provides:

Background compilation using latexmk.
Completion for commands, environments, labels, bibtex entries, and inline maths.
A simple table of contents.
Smart indentation.
Highlight matching \begin/\end and \left\right pairs.
Motion between \begin/\end and \left\right pairs with the % key.
Motion through brackets/braces (with user-defined keys).
Environment objects (e.g., select environement with "vie" or "vae").
Inline math objects (e.g., select inline math with "vi$" or "va$").
Folding of parts (part/chapter/section/etc) and environments.
OmniCompletion for bibliography entries respects BibLaTeX's \addbibresource, \addglobalbib and \addsectionbib commands.
The table of contents functionality does not depend anymore on the assumption that \@writefile{toc}{\contentsline ...} entries in the *.aux file always occur at the start of some line.
Completion of \ref{...} commands was completely rewritten. It is now able to handle \@newlabel{label}{{number}{page}...} entries in the *.aux file even if number or page contain arbitrary nested levels of braces. Labels are additionally held in a cache per *.aux file, which is updated only if the modification time of the file changes.
The table of contents now opens files different from the one currently being edited in a new buffer. (I actually think, that this behaviour was implemented already, but I could not get it working.) To make this work, LaTeX-Box is not loaded per buffer but globally.

This plugins aims at being lightweight and simple. For more fully-fledged plugins, see:

Add Bundle 'LaTeX-Box-Team/LaTeX-Box' to your ~/.vimrc and run :BundleInstall in a vim buffer. Add ! to the command to update.

Add the LaTeX-Box bundle to your bundle directory, for instance with git clone. This will typically be enough:

cd ~/.vim/bundle
git clone git://github.com/LaTeX-Box-Team/LaTeX-Box.git

Copy the directories to your .vim/ folder.

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