Games similar to Sudoku HD+ include LibreSudoku, which is free and open source. Other options are Sudoku & Variants, Sudoku Challenge, Gauguin and Open Sudoku. There's no shortage of Puzzle Games like Sudoku HD+, with more than 25 alternatives for Android, iPad, iPhone, Windows and the web.
Sudoku (originally called Number Place) is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 sub-grids that compose the grid contains all of the digits from 1 to 9.
Brazil
HoDoKu is a sudoku helper written in Java and available in English and German. Generate sudokus in five different and fully configurable difficulty levels. Solve them yourself (with help from HoDoKu's hint system) or let HoDoKu do it for you.
Germany
EU
Yasminoku is a sudoku game, generator and solver created by Joan Alba Maldonado on 25th of July 2006 which has been now improved.
Sudoku Portable is the entertaining and addictive Sudoku puzzle game packaged as a portable app, so you can play on the go.
United States
The developer marked this project as "no longer being actively maintained" on 2016-04-06, so you should rather use it's succesor Open Sudoku.
Sudoku game with numbers, letters or colors. Board size can be from 4 to 20 (default size is 9). You can play many variants - Killer, Greater Than, Consecutive, Odd/Even, Diagonal, Samurai. This program contains editor, solver and can create PDF.
CzechiaEU
A retro-styled logic game with black and stones and a brand-new alternative to sudokus and other logic games.
Play world’s most popular brain game on your iPad and Mac and enjoy all the best features you can’t get anywhere else – thousands of grid designs, four difficulty levels, extensive statistics, Undo & Redo, Auto-Save, Auto-Correct, Auto-Fill hints and more...
It takes inspiration from the Latin "squares", which are based on a logical combination, but developed in three dimensions.
ItalyEU
The popular logic puzzle game "Hitori" will be interesting for the players of any age. The aim of the game is to paint out some cells in such way that there are no duplicate numbers in any row or column. Painted cells cannot share an edge.
