Google stoped sending visitors suddenly !

A few days ago suddenly Google stoped sending visitors .i had like 2000 + visitors from google daily,now i have 100 . it was a suddenly change,not in time .
i don't understand, what could be the reason ? my site (here is the link for this Software Download site ) was up and running 24/24, daily i add new articles ,i get a few links daily for it ,i didn't spam with anything,i didn't do anything wrong. i worked a lot for it.the domain is almost one year old.

i don't understand, what could be the reason ?

thanks for your help

Are your targeted keywords seasonal ? It can be the reason if you are ranking for that kind of keywords. My site is ranking for keywords about travel. And the traffic usually drops drastically in December.

You are probably in a filter of some kind. Check if your website still appears on it's previous place in google's results for your keywords.

my site is indexed very good ,as it was before.only that i don't rank for my keywords anymore.i don't know why

maybe your website into sand box, because there are too many postingnya per day, or too fast optimization

tell me about your ranking, your ranking was down or as it is?