Guard::Passenger automatically restarts Passenger when needed.

Guard::Compass automatically rebuilds scss|sass files when a modification occurs taking in account your compass configuration.

Guard your forms with class (or any other selectors)

ActiveModel guards integration

Guard::CoffeeScript automatically generates your JavaScripts from your CoffeeScripts

Automatically rebuilds Nanoc sites

Guard::Cucumber automatically run your features (much like autotest)

Guard::Ego automatically restarts guard when needed

Watches your assets to automatically package them using Jammit.

Guard::Spork automatically manage Spork DRb servers.

Guard::Stendhal automatically runs your specs with stendhal

Guard::Soca runs soca's push automatically

It protects your server from ssh password guessing bots.

Guard::Less automatically compiles less (like lessc --watch)

Guard gem for krl. Automatically runs krl commit.

Guard::Prove automatically run your Perl tests (much like autotest)

Pusher guard allows to automatically send a Pusher message to any number of browsers.

A simple script that allows you to run Guard to refresh your web browser and optionally recompile Sass/Haml files

Guard::WEBrick automatically starts and restarts WEBrick when needed.

This will watch for changes in your JavaScript project and automatically run JsTestDriver