Stephen Harris

This plug-in will only work on a Multisite running WordPress 3.9+.
This plug-in allows an Network Admin to create admin notices that appear on the top of all admin screens of the 
network’s sites. This notices are styled identically to the “normal” WordPress notices that you might see (WordPress 
updates, “post published” messages etc). Additionally each notice has a “dismiss” link which allows the user to 
instantly dismiss the notice.
Once a user dismisses a notice there will never again see that notice, on any of the network’s site.
Health Warning: The notice messages are considered HTML! A “small” inline tinyMCE editor will be used in a 
future update. But for the time being be aware that when you create/edit notices you are editing HTML (think WordPress 
‘text’ tab on the editor).
Before using the support forums, please read the FAQ. Thank you!

Multisite Admin Notices

Allows a network admin to create admin notices for blog admins.

DannyvanHolten

Show your WordPress admin notices in a growlike / better way, and snooze them whenever you see fit.
This WordPress plug-in aims to make admin notices more colorful and noticable so they are really an addition to your admin.
In addition to making them more noticable WP Growl also makes it possible to snooze notices for you so you can really keep focus on the work you should do now.
And last but not least, WP Growl is here to fight those annoying notices being abused for advertising! We try to hide any notices being used by plug-ins.
If you notice any abuse or want to get involved visit the <a href="https://github.com/DannyvanHolten/wp-growl-notifications" rel="nofollow ugc">WP Growl GitHub Repository.</a>

WP Growl

WP Growl notifications make my day better, they finally catch my eye

Improved admin notices

Show your WordPress admin notices in a growlike / better way, and snooze them whenever you see fit.

Multisite Admin Notices vs WP Growl