Sometimes you could use a scanner when one isn’t handy. Genius Scan attempts to bridge the gap when you need to send snippets of documents in PDF or JPEG form via e-mail, social networks or other apps on your phone. If you have a multi-page document, you can append several snaps to the same file before sending it on. You can also crop and straighten pictures. The app has its limitations — namely the fact that you’re limited to a smartphone camera and can’t get full pages. But if you need to send a section or two of a larger document quickly, Genius Scan is a good free option. Free, for iOS. If you’re interested in more features, there is also a paid version for iOS and Windows Phone.