Singletons get a bad rap. Why? Should you use them in your application? And if you've inherited several of them, what should you do?

• Singleton Pattern
• A Controller by Any Other Name (Soroush)
• The Sin in Singleton (Ben Sandofsky)
• singletons.info (Chris's blog posts and other links about singletons)
  • Real World Singleton Design
  • Singletons in Cocoa applications
  • Quick followup on singletons
• Using static let to create singletons in Swift
  • Using static let is thread-safe
• Avoiding Singleton Abuse (Stephen Poletto)