protobuf-net by: Marc Gravell

Provides simple access to fast and efficient "Protocol Buffers" serialization from .NET applications

protobuf-net.Core by: Marc Gravell

Provides simple access to fast and efficient "Protocol Buffers" serialization from .NET applications

QRCoder by: Raffael Herrmann Shane Krueger

QRCoder is a simple library, written in C#.NET, which enables you to create QR codes.

QRCoder-ImageSharp by: Raffael Herrmann Joerg Plenert

QRCoder is a simple library, written in C#.NET, which enables you to create QR codes. Based on ImageSharp to provide plattform independency.

QueryDesigner by: Vladislav Zhukov

QueryDesigner provides way of creating complex IQueryable filtering based on dynamic expression trees.

RabbitMQ.Client by: Broadcom

The RabbitMQ .NET client is the official client library for C# (and, implicitly, other .NET languages)

Portable.BouncyCastle-Signed by: Mark Junker

BouncyCastle.Crypto is a cryptography API providing: -Generation and parsing of PKCS#12 files. -X.509: Generators and parsers for V1 and V3 certificates, V2 CRLs and attribute certificates. -PBE algorithms supported by PBEUtil: PBEwithMD2andDES-CBC, PBEwithMD2andRC2-CBC, PBEwithMD5andDES-CBC, PBEwithMD5andRC2-CBC, PBEwithSHA1andDES-CBC, PBEwithSHA1andRC2-CBC, PBEwithSHA-1and128bitRC4, PBEwithSHA-1and40bitRC4, PBEwithSHA-1and3-keyDESEDE-CBC, PBEwithSHA-1and2-keyDESEDE-CBC, PBEwithSHA-1and128bitRC2-CBC, PBEwithSHA-1and40bitRC2-CBC, PBEwithHmacSHA-1, PBEwithHmacSHA-224, PBEwithHmacSHA-256, PBEwithHmacRIPEMD128, PBEwithHmacRIPEMD160, and PBEwithHmacRIPEMD256. -Signature algorithms supported by SignerUtilities: MD2withRSA, MD4withRSA, MD5withRSA, RIPEMD128withRSA, RIPEMD160withRSA, RIPEMD256withRSA, SHA-1withRSA, SHA-224withRSA, SHA-256withRSAandMGF1, SHA-384withRSAandMGF1, SHA-512withRSAandMGF1, SHA-1withDSA, and SHA-1withECDSA. -Symmetric key algorithms: AES, Blowfish, Camellia, CAST5, CAST6, DESede, DES, GOST28147, HC-128, HC-256, IDEA, NaccacheStern, RC2, RC4, RC5-32, RC5-64, RC6, Rijndael, Serpent, Skipjack, TEA/XTEA, Twofish, and VMPC. -Symmetric key modes: CBC, CFB, CTS, GOFB, OFB, OpenPGPCFB, and SIC (or CTR). -Symmetric key paddings: ISO10126d2, ISO7816d4, PKCS#5/7, TBC, X.923, and Zero Byte. -Asymmetric key algorithms: RSA (with blinding), ElGamal, DSA, ECDSA. -Asymmetric key paddings/encodings: ISO9796d1, OAEP, and PKCS#1. -Digests: GOST3411, MD2, MD4, MD5, RIPEMD128, RIPEMD160, RIPEMD256, RIPEMD320, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, Tiger, and Whirlpool. -Signer mechanisms: DSA, ECDSA, ECGOST3410, GOST3410, ISO9796d2, PSS, RSA. -Key Agreement: Diffie-Hellman and EC-DH. -Macs: CBCBlockCipher, CFBBlockCipher, GOST28147, HMac, and ISO9797 Alg. 3. -PBE generators: PKCS#12, and PKCS#5 - schemes 1 and 2. -OpenPGP (RFC 2440) -Cryptographic Message Syntax (CMS, RFC 3852), including streaming API. -Online Certificate Status Protocol (OCSP, RFC 2560). -Time Stamp Protocol (TSP, RFC 3161). -TLS/SSL Client with support for client side authentication. Support for .NET 4, Windows Phone 8, Windows Phone App 8.1, Windows 8, Silverlight 5, MonoTouch, MonoAndroid

prometheus-net by: andrasm qed- lakario sandersaares

.NET client library for the Prometheus monitoring and alerting system

Portable.ConcurrentDictionary by: Stef Heyenrath

This is a .NET Standard 1.0, .NET 2.0, .NET 3.5, Silverlight 5.0 and Windows Phone Silverlight 8.0 & 8.1 backport from System.Collections.Concurrent.ConcurrentDictionary as defined in .NET Core

Quill.Delta by: blushingpenguin nozer

Converts Quill's Delta format to HTML/XHTML

postgrest-csharp by: Joseph Schultz <joseph@acupofjose.com>

Postgrest-csharp is written primarily as a helper library for supabase/supabase-csharp, however, it should be easy enough to use outside of the supabase ecosystem. The bulk of this library is a translation and c-sharp-ification of the supabase/postgrest-js library.

QRCoder.Core by: Afonso Dutra Nogueira Filho

QRCoder.Core, written in C#.NET, which enables you to create QR codes Use System.Drawing.Common below 7.0.0.

Portable.System.DateTimeOnly by: Oleg Rakhmatulin

DateOnly and TimeOnly types for .NET versions before 6.0

PuppeteerSharp by: Darío Kondratiuk

Headless Browser .NET API

Quartz.Extensions.Hosting by: Andrew Lock Marko Lahma Quartz.NET

Quartz.NET Generic Host integration; Quartz Scheduling Framework for .NET

QuestPDF by: MarcinZiabek

Generate and edit PDF documents in your .NET applications using the open-source QuestPDF library and its C# Fluent API. Build invoices, reports and data exports with ease.

Quartz by: Marko Lahma Quartz.NET

Quartz Scheduling Framework for .NET

Quartz.Serialization.Json by: Marko Lahma Quartz.NET

Quartz.NET JSON Serialization Support; Quartz Scheduling Framework for .NET

Quartz.Extensions.DependencyInjection by: Facundo Glaeser Marko Lahma Quartz.NET

Quartz.NET Microsoft.Extensions.DependencyInjection integration; Quartz Scheduling Framework for .NET

Pragmastat by: Andrey Akinshin

Pragmatic Statistical Toolkit