As skiers hit the slopes in what is now the thick of the winter skiing season, they’ll no doubt have all kinds of equipment. As PC Mike Wendland shows in his report this week, you might want to consider adding some useful apps to your list of gear. The Liftopia app helps users save up to 80 percent on lift tickets, ski and snowboard lessons, equipment rentals and more at hundreds of ski area across the country. Store your favorite ski resorts or discover nearby ski areas and deals using your smartphone’s built-in GPS. The app is free for iOS. OnTheSnow delivers daily snow reports and current conditions from the…