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.
Indigo (board game)
The board takes the form of a hexagonal grid, with one tile present at the centre and six at the edge, with even intervals. The rest of the board is empty. On the centre tile are six jewels: one sapphire and five emeralds. The six tiles at the edge have one topaz each. The edges of the board between the tiles with topazes are marked with the players' colours. Depending on the number of players, a player can either have an edge all to his/her own, share an edge with another player, or both.