Top 20 NuGet interfaces Packages

R MessageBus Interfaces
A small set of purposefully simple interfaces that are commonly required in .NET web applications.
Public interfaces for using EFPF features in business layer (or other than the DAL).
Unit tests Data Access interfaces
ServiceConnect Interfaces
Provides easily mockable interfaces for common services
Wrapperator that provides interfaces and corresponding wrappers for system classes to allow faking them.
Dogma is a simple C# => TypeScript module interface declaration generator. Synchronize your dogmas!
MAF Interface provides the MAF IoC interfaces for concrete application implementations (service factories, service objects, authentication, business logic and storage logic).
Implements TestableFileSystem.Interfaces by forwarding to the .NET Framework or .NET Core.
Implements TestableFileSystem.Interfaces using a blazingly fast in-memory NTFS-based file system.
You can write logs from your custom applications that use agents, custom pages, and event handlers.
Utilities for projects with base classes, models, interfaces, attributes and useful tools.
A cross cutting concern library which provides interfaces, base classes and generic implementations for the command design patterns.
A cross cutting concern library which just provides interfaces and base classes for the command design patterns.
A set of boilerplate code libraries that facilitate implementation of S.O.L.I.D principles in .Net solutions
Data contract interfaces.
Helpers and Utilities for RedRocket Framework such as: annotation interfaces with data annotations and formatting strings.
Interfaces for Lykke.EmailProvider package
Interfaces to substitute System.IO calls in the .NET Framework and .NET Core.