Installation 
Install via npm, node package manager. Example would be...
npm install -g watchme
Motivation
Well, frankly iNotify was annoying me. Along with most of the other mac alternatives. So I've created a watching app in coffeescript that will watch a target filehandle for any changes and rerun the given command when it senses them.
Example
Great for web development- just write a quick applescript to refresh Google Chrome (like here) and then run this script like...
watchme app --exec "osascript ~/refresh.applescript"
Usage
Watchme - CoffeeScript
Usage:
watchme -c [ file | dir ]... -e "<cmd>"
watchme -i <regex> -e "<cmd>"
watchme -h | --help
watchme -v | --version
Options:
-e --exec Prefix for the command to execute.
-c --clear Clear the screen on each trigger.
-q --quiet Do not display repeat trigger.
-h --hidden Include hidden files.
-i --regex Recursively match regex for files.
-h --help Show this screen.
--version Show version.
Contributions
...are always appreciated! If you want to contribute, then open an issue, fork the repo, implement your feature and back it up with tests and I will absolutely merge it in.