andmartinelli 

Provides an almost drop-in replacement for String, with allocation-free substring/split methods, along with a ToStringCached() extension method that can be used on StringBuilders, ValueStrings and so on.

Low-allocation version of DiffMatchPatch

Additional System.Drawing APIs for netstandard .NET Standard

Excel spreadsheet (xlsx) manipulation library

Creates fast, strongly typed delegates for accessing methods, fields and properties. The right overload is automatically chosen based on the type arguments of Func<> or Action<>.

SevenZipSharp for netstandard and a few bug fixes.

An optimized version of HtmlAgilityPack with many bug fixes and improvements. Improved features: * Minimizes heap allocations and avoids duplicate strings in the heap * HtmlAttribute, HtmlAttributeCollection, HtmlNodeCollection are now structs * Proper encoding/unencoding of attributes * Fixed... More information

Provides an almost drop-in replacement for System.IO.File, optimized for a very large number of small files. Data is batched in package files, and can be read sequentially.

Low-allocation version of Snowball stemmers.

HTTP and HTML processing library

Shaman.Configuration.Metadata

Utils for efficiently reading from streams of UTF8 text. Commonly used types: Utf8StreamReader, Utf8StreamWriter, CsvReader, SqlDumpReader, Utf8StringCache, Utf8StringExtensions, Utf8Utils, MemoryBuffer, Scratchpad.

Misc extension methods: CaptureBetween, CaptureAfter, CaptureBefore, RecursiveEnumeration, In.

JSON/Protobuf serialization utilities, and console/CSV output support

Npgsql is a .NET data provider for PostgreSQL, 100% implemented in C# code. PostgreSQL 9.x and above is officially supported, other versions may work.

Shaman.DbLinq

Shaman.Fizzler

Filesystem-related utilities

Provides wrappers for executing external processes, capturing their stdout, and automatically checking their exit code.

Strong named, netstandard-compatible version of CurlSharp.