Top 20 NuGet random Packages

Instead of using pseudo random numbers this implementation uses the RNGCryptoServiceProvide
Various fluent style data generators and extension methods for constrained non-determinism in your unit tests, integration tests, general automation projects and mock-ups.
Unified algorithm support for indexed .NET collections.
Static classes for ASP.NET MVC to do some common operations. See the home please: https://github.com/AtaS/Mvc-Utilities
Library generate data, based on clear specification
tinhat : crypto random for the truly paranoid. tinhat guarantees not to reduce the strength of your crypto random. But if your OS crypto random has in any way been undermined (for example, by a nefarious government agency, or simple incompetence) then tinhat has the ability to improve the strength...
Fluky is a random framework to generate random strings, numbers, names, etc. to help reduce some of the monotony particularly while writing automated tests or anywhere else you need anything random data. Mock data library.
A lightweight library of common utilities for working with random numbers
Dice - is a fake data generator for .Net.
MathExtensions is a library for .NET that aims to provide useful extensions methods regarding various mathematical domains, like combinatorics, sequence analysis, sequence generation, sequence manipulation, random extractions, etc.
The FsRandom library ported to .NET Standard, and powered by the PCG Pseudo-Random Number Generator.
K-ordered, semi-random, distributed unique Id generator using base 36. Overcomes several weaknesses of integer, Guid and SequentialGuid identifiers.
Library containing basic abstractions to cryptography. Aims to fill the gap in cryptographic API lack in .NET Standard 1.0, and to co-operate with existing cryptographic API in other .NET frameworks.
Provides block-based digest-producing cryptographical algorithms. Also provides concrete implementation for RandomGenerator interface of UtilPack.Cryptography package.
RANDOM.ORG service client based on RANDOM.ORG API v2 (Core API)
Easily generate random models
Random string generator targeting netstandard1.3
Generates random numbers for creating a high-performance test stream. This stream pre-generates generates a few megabytes of random data, and uses that same data repeatedly. This is not suitable for security purposes. However, for testing data processing pipelines, this provides just what is need...
Provides random element selection backed by a thread-safe source of random numbers.
Random data generator for POCO classes