Here are the list of common concept, Typically required by any application(Web/Mobile/Desktop).

• List pre-build components or widgets.
• Customize of UI/Themes
• Localizations i18
• Navigation/URL Routing
• State Management
• Singleton Services
• Networking capabilities (Like HTTP, WebSocket, UDP)
• Local Storge – Cache/Cookies/AppData
• Observer Design Pattern
• Multi Threading
• Access to Life cycle methods of component/class/widget
• Exception handling
• Database accessibility – NoSQL and SQL
• Drawing and Animation
• Hot Restart
• Access to native device capabilities like Files/Camera/GPS.
• Testing – Unit and System Testing
• Observability – Three pillars Metrics, Traces, and Logs.
• Authentication & Authorization
• CI & CD
• Orchestration – Docker, Kubernetes
  • Single Node Cluster
  • Multi-node Cluster
  • Disaster-proof Cluster