Gomoku
Gomoku, also called "Five in a Row", is an abstract strategy board game. It is traditionally played with Go pieces (black and white stones) on a Go board, using 15×15 of the 19×19 grid intersections. Because pieces are not moved or removed from the board, Gomoku may also be played as a paper-and-pencil game. The game is known in several countries under different names.
Gonnect
Gonnect is a strategy board game for two players invented by João Pedro Neto in 2000. The game is played with standard Go equipment (usually on a 13×13 or 15×15 board) and basically uses the same rules as Go, however the goal of the game is to construct a group that connects any two opposite sides.