Go 4 It! for Windows Phone 7
Description:  Go 4 It! is a very simple, very quick, 2-player game in which players take turns dropping pieces into columns of a 7×6 playing area in an attempt to get four consecutive pieces in a row, column, or diagonal.
App URL:  http://windowsphone.com/s?appid=75aed61a-99a2-e011-986b-78e7d1fa76f8
How to Play Go 4 It!
To play a piece:
To play a piece, tap the piece in the blue area above the desired column. The piece will fall until it is on top of the last piece played in that column. If the column is full, there will not be a piece above the column.
The game is over when:
The game ends when one of the players gets four or more consecutive pieces vertically, horizontally, and/or diagonally. If all columns are full and neither player has four consecutive pieces, the game is a tie.