NotifyClean 3.8.4 [free]

You could configure which apps are allowed to create notifications in the top left area, the notification area. If an app creates a notification it will be collected and added to the list.
You could deny *all* notifications of an app or only *specific* messages - if it's not a customized notification. So I used it to hide "waiting for connection", but not "you are connected".
With a donation you supports this app and get more options.

IMPORTANT
Your device has to be rooted to install the required X-posed framework: http://tinyurl.com/cd46qco

Donator-App & Features: https://play.google.com/store/apps/details?id=de.defim.apk.notifyclean.donator

• 01/29/2017: NotifyClean 3.8.4
• 12/19/2016: NotifyClean 3.8.3
• 04/29/2016: NotifyClean 3.7.1
• 11/25/2015: NotifyClean 3.7.0
• 07/13/2015: NotifyClean 3.5.0
• 05/04/2015: NotifyClean 3.1.6
• 04/08/2015: NotifyClean 3.1.5
• 04/01/2015: NotifyClean 3.1.4
• 03/23/2015: NotifyClean 3.1.2
• 03/10/2015: NotifyClean 3.1.0
• 03/08/2015: NotifyClean 3.0.1
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