Cool app that helps you keep all your quilt block ideas in one place. If you're into quilting or patchwork.
You can add blocks, and include stuff like the name, what kind it is(like Applique), how hard it is (Beginner, etc), the size (in mm), what it's made of (wool, cotton), and pictures of how it should look. You can also jot down notes and measurements, so it's easy to use the block again later.