Feel free to add suggestions, but I recommend you check the sources using the links given here.
To start the list:
http://www.pic4ever.com/
Of course there is rarely such a thing as a free lunch - the site has ads which are seen when users pick their emoticons - and Kitco does not endorse the advertising on that site.
Checks:
McAfee Site advisor: OK
http://www.siteadvisor.com/sites/www.pic4ever.com
Norton safe web: OK
https://safeweb.norton.com/report/sh...w.pic4ever.com
WOT Reputation: OK
https://www.mywot.com/en/scorecard/www.pic4ever.com