Yes, but only the chess and other board
games in this mighty toolbox are shareware.
The main function on Kindles will often be the very, very good port of Cool Reader (which I love much more than KOReader...). And this is freeware/open source, and so are also the tiny calculator, the file manager, the notepad application and the terminal ...
BTW: Don't like the games? Just remove them from /vlasovsoft/applications.ini ASCII file, and remove also the appropriate subdirectories for each game.