Gomoku is an abstract strategy board game. Also called Gobang or Five in a Row, it is traditionally played with Go pieces (black and white stones) on a go board with 19×19 intersections.
You can check it out and challenge your friend online via this link: http://skillgamesboard.com/play-gomoku-online.aspx.
On top of that, there are 4 other popular online board games on the way: Backgammon, Connect Four, Squares and Mahjong. More information on the dates of the release will follow.