GEOPosCalc 2.0.0.1 - GEOPosCalc is an easy to use and powerfull tool for coordinate systems (grid) and datum conversion.
Puzzle - Sam Lloyd's logical game 10 - 15 Puzzle - Sam Lloyd's logical game to play online. Play online Sam Lloyd's "15" puzzle. The funny story and mathematical implications of this game. Some funny logical problems with the 15 game. Everybody knows this logical game's purpose: the playe