iOS continues to evolve and we're constantly looking to improve our code while providing rich user experiences. Here's a few ideas people have had that continue to push the envelope in architectural design patterns.

• VIPER - Designed for testability
• SOLID principles - some guidelines on how to separate the components of your code
• ReSwift (based on REDUX) - Attempts to more clearly separate state vs actions
• MVVM - Model -- View -- View-Model
• CORE - Brings state machines
• 4v Engine - An enhancement over VIPER and MVVM-C