AngularJS collaboration board with Socket.io

 

http://www.creativebloq.com/javascript/angularjs-collaboration-board-socketio-2132885

Why high-intensity training is better than high-volume training

 

http://www.brianmac.co.uk/swimming/swimspeed.htm

Blacklists check

 

http://mxtoolbox.com/blacklists.aspx