Sokoban for Windows is a classic strategy game. It's easy to learn and once you start you can't stop playing it. The levels range from easy to extremely difficult. The game was invented in Japan in 1980. The game is Copyright 1982 Thinking Rabbit. More about Sokoban here.
This program is shareware, this means that you can download and use it for free for a period of 30 days. After that, a few features of the program are disabled. If you continue to use it after the 30 day trial period, you are required to register the program. The registration fee is only $ 16.90.
The game includes 14686 levels and more are added all the time. There are 36 skins to choose from.

* Play solution forward and reverse, step by step or full speed.
* Live Update runs in the background.
* Orientation indicator for transformations
* Restart level button.
* New very fast drag and drop algorithm
* Show all possible moves
* Quick Save, save and restore a position quickly
* Play levels in sequence or random order
* Rotate and mirror the level while playing
* Optimize on pushes or moves.
* Level Browser gives lightning fast navigation
* Select to play unsolved or all levels
* Internet Live Update (levels, program, skins, help)
* Save and replay solutions
* Advanced Level Editor
* Plays MP3 and midi music
* Re sizable screen up to 100 x 100
* Unlimited undo
* A tool for making skins
* New XML file format
* and much much more ...

The license of this software is Free Trial Software, the price is $19.90, you can free download and get a free trial.