As spring turns into summer, chances are you have a few projects to start around the house. Maybe you want to learn how to frost a cake, or get going on new curtains for the guest room. But if you need a little help getting going, consider downloading Craftsy’s app, which provides access to classes from the online crafting community’s Web site. The app has paid and free classes, though you’ll need to sign up for a Craftsy account if any of the paid classes catches your eye. (For current Craftsy users, keep in mind that not every class from the site is on the mobile app.) The app is great for some basic instruction, or even just to browse for inspiration. Free, for iOS devices.