Free. Current App Store rating: 4.5 stars
The popular Evernote note-taking app has a huge following and ecosystem of connected apps and services; there's even an Evernote-branded scanner. But if you're looking for something different, download Springpad, an alternative Web-clipping and note-taking app. First off, Springpad's interface is more intuitive and visually appealing. You can subscribe to notebooks that others produce, such as a low-calorie recipe notebook from a health publication. You automatically receive updates to notebooks you follow when they become available. Springpad is an excellent tool for combining your notes with stuff you find online. Plus, you can share notebooks with collaborators for free. Take note, Evernote.