Just about every owner of an iPod Touch, iPhone or iWhatever Else has his or her own collection of applications, some of these collections ginormous and some puny. For those wondering what to get next, these four make excellent choices.

Pac-Man

This classic game has a free version in the App Store and a $4.99 full game for those who enjoy spending money. As in every Pac-Man game ever made, you are a little yellow ball who must eat all the pellets in a maze without getting eaten by ghosts. There are three methods of controls available: tilting the phone in the direction you want to go, swiping your finger across the screen, or using a joystick at the bottom of the screen. Although the joystick may seem more awesome, the tilting option is far more convenient for most people.

Complete with the old graphics and soundtrack (which are great throwbacks), this game makes an excellent distraction from homework, boring plane flights or wedding services, and is thus a great choice for the iPhone.

Sudoku 2

Sudoku is a game that is more intellectually stimulating than most of those available, especially for all the “math-lovers” out there. This iPhone adaptation of the popular newspaper game has three levels of difficulty along with a scoring system and two different layouts to choose from.

This app is fairly easy to use, and a Pro version is available for $2.99 if the ads are too bothersome or if that wallet just won’t clean itself. Overall, this game is a great choice, probably even more so for those who are actually good at sudoku.

Pandora Radio

For music fans, this is probably the sweetest deal in the App Store. The user enters in a song or band that they enjoy listening to and like an iPod playlist, the app plays selected songs with similar qualities. It also offers a thumbs-up or thumbs-down button for each song to better determine what else to play and explanations of why each song was picked.

Pandora Radio is especially handy for those who want to hear something different or discover new bands. Furthermore, unlike the iTunes store, it is free. Therefore, this app is essential for anyone who enjoys music.

Flashlight.

This app (Flashlight., with a period) is remarkably straightforward. All that the user has to do is open the app and the screen produces a bright light, with seven choices for color, although the white default works best.

Although it is not as good as a regular flashlight, Flashlight. is a handy app to have in case it’s dark out and there’s no other source of light, which is not an unusual situation for the night owls of Los Altos. As the icing on the cake, it is also free, which is more than can be said for real flashlights.