JaegerMa 

Small .NET Standard 2.0 compatible library to split a string into command-line args

SharpINI is a simple .NET Standard 2.0 compatible library to parse and write INI strings

SharpYAJ - YetAnotherJSON Reader/Writer for C# is a .NET Standard 2.0 compatible library to serialize and deserialize JSON strings

.NET Standard 2.0 compatible library to manage embedded files in loaded assemblies

.NET Standard 2.0 compatible library to dynamically load external .NET libraries into the runtime