I know people really enjoy not being notified. However for things like email for me, since I need to be reading and up to date on them for work, it's much easier to look to the upper right of your screen and see what it is instead of switching apps and checking to see it's just a 'normal' email you don't need to respond to.
For email and events, I don't really need another piece of software. Chrome offers desktop notifications for webapps & extensions (e.g Gmail & Google Calendar).
Actually, being notified at unpredictable intervals, as a bit of random-reward, has effects on the limbic system similar to gambling and drugs. Onscreen notifications let you binge on these little pleasures: enjoyable, yes, but rarely productive.
Also to keep in mind: if you downvote this, you are probably an addict in denial! Our 12-click program is arranging meetings now in major tech hubs, check meetup.com for all the details.