My Programming Languages course uses L, an extension of the lambda calculus. As something of a toy language, and with a remarkably ungoogleable name, I couldn't find a syntax file, so I made one. Install this plugin however you do with with your plugin manager; two common examples follow:
With Pathogen,
git clone http://github.com/rperce/L-syntax ~/.git/bundle/L-syntax
(if you keep dotfiles in a repo, and use submodules for your plugins, you shouldn't need me to tell you what to do with this).
With Vundle, put
Plugin 'rperce/L-syntax'
in the Vundle section of your .vimrc, then run :PluginInstall inside vim.
If you don't use a plugin manager at all, I'd recommend using one of the above plugin
managers. If you're stubborn, put the files in this repository in their named folders
under your .vim directory directly, so you have something like
.vim
|
+- ftdetect
| |
| +- L.vim
|
+- syntax
|
+- L.vim
Make sure you put the correct L.vim in the correct spot.