Most programs not visible in Programs and Features in windows 7
Here's a link to an article on how the Programs&Features list actually works: http://community.spiceworks.com/how_to/2238-how-add-remove-programs-works
In the particular case of your poker program, it's the presence of the SystemComponent value in the programs's registry key with data "1" that prevents it being included in the list (so the article says). I assume that your other "missing" programs have similar reasons for being excluded.