Yelp for iOS — When in New York City, the two tightest distance filters are measured in blocks, not miles.
Facebook Camera - After clicking the install now button, a pop-up message offers to text you a direct link to the app, with your phone number pre-filled in.
/via Taylor McKnight
Google Plus - After automatically uploading photos from your phone, the option to share those photos is appended to the camera icon in the Status box.
/via Peter Gasston
Batch - When enabling the camera flash, the camera icon on the shutter button gets a little white flash.