Recommended games:
Picma Squared
Picma Squared is a picture logic game. The goal is to discover the image hidden within each puzzle by following a couple of simple rules and using nothing but logic.
It features 28 puzzles, an easy to use, colourblind-friendly interface and a comprehensive Help section. In addition, it is the only puzzler of it's kind to offer the challenge of multi-coloured puzzles.
Daily Squares
Daily Squares is a daily puzzle game. The object is to arrange all of the active blocks such that all of the rows, columns, and diagonals all add up to 34.
The games is based on the basic concept of magic squares. In this case, it is a 4x4 magic square. If you are familiar with the game Sudoku, then you may find it interesting that Sudoku is based on magic squares.
A game from mathtricks.org.
Kakuro
Entertaining game similar to sudoku that is to complete the boxes with a number between 1 and 9. Each row or column must add the value indicated, and no number can be repeated in an amount
White Sudoku
Sudoku with stylish scalable graphics, puzzle generator, editor and other useful things
Sudoku 24
Sudoku 24 is a classical sudoku game and it contains 3 different difficulty levels. There are 24 unique puzzles.
Halloween Picdoku
Halloween Picdoku is a classical sudoku game, which has pictures instead of numbers.