xStack4 for PALM 

Play 4 games: Stack4 (Connect 4), Stack 4x4, Connectris and Anti-Stack 4 on your Palm. The goal of the games is to arrange four stone in a row. For anti-games goal is to force enemy create four stone in a row.
connect 4 anti-stack 4 connectris stack4x4

xStack4 for Pocket PC 

Play 4 games: Stack4 (Connect 4), Stack 4x4, Connectris and Anti-Stack 4 on your Pocket PC. The goal of the games is to arrange four stone in a row. For anti-games goal is to force enemy create four stone in a row.
connect 4 anti-stack 4 connectris stack4x4