Despite carrying a price tag on iPhone and iPad, the recently launched Mac version of Touchgrind is free of charge! Using only movements of your fingers on the trackpad -- which means you'll need either a multi-touch compatible MacBook/MacBook Pro or a Magic Trackpad. The learning curve is steep, but the end result can be very rewarding.

If you're a big fan of trains or quick, simple puzzles (or both), be sure to snag Rail Maze, an ad-supported app that finds you rearranging track segments to guide trains from one end of the track to another. In addition, you'll also avoid pirate trains and navigate various tunnels, plus you can create your own railroads if you find a creative spark amidst the motoring mayhem.

Sitting somewhere between other vehicle-based platform games like Snuggle Truck and Trials, Alpine Crawler finds you manning the gas and brakes to safely guide a flimsy pickup truck through several treacherous, up-and-down stages. It's a simple approach, but navigating the various hazards remains surprisingly entertaining.

Basketmania lets you shoot hoops on your Mac without dropping a penny, and the three included game modes offer different ways to enjoy the simple b-ball action, Simply choose the arc of your shot with the mouse or trackpad and let 'er rip! It's almost like Angry Birds -- but instead, it's basketball.

Fans of Magic: The Gathering and other popular collectible card games should flock to Shadow Era, a free-to-play alternative that boasts more than a million users across platforms (including iOS and web) and gives you a gratis starter deck to work with. Granted, you'll need to drop a little coin to purchase better cards, but even without the investment this fantasy card game offers surprising depth.

Based on the title alone, you might assume Shotgun FunFun is a bit violent -- and it is. This side-scrolling action game finds your firearm-wielding protagonist fending off the demon-zombie masses for as long as possible. It's not the most complex experience, and the controls are definitely a bit awkward, but it's a swell way to safely blow off some steam!

The classic game of Hangman comes to life in Doodle Hangman Free, which presents the letter-guessing game on virtual pages of notebook paper upon which the titular character struggles in his noose with each missed letter. It's a pretty straightforward affair, otherwise, but with solo and two-player options, this free download offers up solid entertainment.

Cataline Kitty borrows its immensely charming fabric-based look from last year's Wii hit, Kirby's Epic Yarn, and the core mechanic certainly has an Angry Birds-like feel from it. In the game, you'll fling a cat towards a goal, and later toss a ball of yarn in mid-air to other felines, but while short-lived (unless you pay for more levels), it's an amusing little diversion.

Solitaire is one of the absolute best single-player time wasters, and Full Deck Solitaire is a surprisingly robust free choice that packs in a wide variety of play options into one tiny package. With 22 different solitaire options out of the box, this game alone may fulfill all the gaming needs of any card enthusiast -- plus the animated backgrounds help soothe the inevitable misery of defeat at your own hands.

If you're into color-matching puzzle games like Bust-a-Move, you might get a quick kick out of Bubble Shootix, a pearl-shooting game that takes strong cues from that established hit while introducing some new elements of its own. In addition to linking like colors, you can also chain together longer combos and earn bonus points for bouncing pearls off walls.