Top 20 NuGet serializer Packages

Custom JsonConverters for Newtonsoft's Json.Net to serialize and deserialize various types.
Fast CSV to object serializer and deserializer.
A small, short and direct library to serialize and parse fixed length content.
YAML based Serializer for .NET Core. It allows objects to be serialized partially using groups, choosing naming conventions, etcetera.
ASP.NET Core plugin for NSerializer
Provides an Avro Serializer and Deserializer for use with Axual.Kafka.Proxy client
Abstraction convertion functionalities and polymorphism for System.Text.Json
Elders.Proteus
Json serializer and deserializer for .net
A library to help those poor souls still stuck in the dark ages of Visual Basic 6. DMC12-Serializer loads VB6 UDTs (Universal Data Types, i.e. structs) into .NET objects, and produces VB6-compatible dumps.
Fast and dependency-free XML serializer for .NET written in F#
Smallest, fastest polymorphic JSON serializer; Kamran Ayub's fork of fastJSON @ v2.0.13. The revision number corresponds to the version of my fork.
A very fast and minimal serializer
A small two-file JSON de/serializer in C# that also works on MonoDroid/MonoTouch
Abstract data notation for creating domain specific data notations.
just an Apple PList format serializer