The first featured link is "Handling Storyboard Merge Conflicts" by Joe Keeley. Storyboards are really useful but can become a problem as your team grows, especially because of merge conflicts. Joe's post will help you understand and identify 5 different types of merge conflicts.
The second featured link is How I discovered Instagram's upcoming video calling feature on iOS, by Guilherme Rambo. Guilherme is a really important developer for the iOS community: He's a panelist for two Podcasts, coordinator of the iOS track of a conference, writer for 9to5Mac while being an amazing developer who is into reverse engineering apps.