I was little bit bored but also didn't really feel like doing any real work (haha). Here's a pretty simple plugin, I think this could be a model for any purely client-side plugin. Nothing server side at all, just a way to deploy css/less and a front-end JS file.
Replaces the default app.alert toaster message with the more fancier Toastr plugin. Feel free to fork and make it more cooler 
npm install nodebb-plugin-toastr
Check out Toastr here: https://github.com/CodeSeven/toastr
Get it on GitHub
Just gonna ninja-install it here...
Edit: 
Can this be used as a link ? if people click they go to the Post I want them to read.
@gaasg said:
Can this be used as a link ? if people click they go to the Post I want them to read.
With it installed you could create an HTML widget that contains
toastr.info('Please visit <a href="#">this</a> topic to read our rules. ')
You could make it visible for those not logged in, those that are. Save so it only appears once. Etc.
@a_5mith said:
toastr.info('Please visit <a href="#">this</a> topic to read our rules. ')
That's great, thank you.
