A map to help Android and iOS developpers to find which UWP components they can use: Windows apps concept mapping for Android and iOS developers. If you know Android/iOS components for a particulat task, you will find UWP equivalent.
UWP
Which networking technology for UWP?
Guide to choose networking technologie for UWP: Which networking technology? – Windows app development
Data virtualization in UWP
ListView and GridView data virtualization details strategies to follow and interfaces to implement for very large list implementations.