sunamo 

Library with templates for throwing exceptions

Values shared across many packages

Enums shared across many packages

Shared library with data classes passed into methods as arguments

Shared delegates across many packages

Shared packages across packages with instance data-holder classes

Advanced working with colors

For working with extensions of files

Dictionary where every key is value and vice versa

Support for language, independent of translating solution

Methods for show Countdown and other UI in cmd

Interfaces shared across many packages

Almost all extensions method which I'm using

One of base foundation for sunamo's app platform - second is SunamoPlatformUwpInterop

Data for deriving in every SunamoString package

Generating string output in various formats

ReadAllText, WriteAllText etc. with some magic ability

Advanced working with base .NET type (parsing etc.)

Just fork from https://www.nuget.org/packages/fmdev.XliffParser, due to .NET 5+

Methods for splitting strings