Top 20 NuGet identityserver Packages

Neo4j Graph Database stores and services for IdentityServer3
Google Recaptcha middleware for OpenIdConnect (IdentityServer)
A plugin for IdentityServer v4 that uses ASP.NET Core Identity as its identity management library.
IdentityServer3 - Cookie-Store Redis is a library that includes the implementation for storing cookies in redis.
Marten persistence layer for IdentityServer4 using postgresql as a document store
Dapper extension for IdentityServer3
The core infrastructures for Asp.Net Core to convert RESTful API to code + message/data structure.
A persistence provider for IdentityServer3 using Shaolinq
Nhibernate-based persistence layer for IdentityServer3
Gunnsoft ASP.NET Core Razor
Unofficial EntityFramework 6 persistence layer for IdentityServer4
Full .Net Core implementation of WsFederation for IdentityServer4 and asp.net core.
Based Librame.AspNetCore.Abstractions on IdentityServer application package.
IdentityServer4 key management via Azure Key Vault certificates.
Azure Table Storage is one of the cheapest storage mechanisms available nowadays. You can now use this storage environment for your IdentityServer setup.
Based Librame.AspNetCore.IdentityServer.Abstractions with the Web extension package.
Zero-effort key management extension for IdentityServer4. This package adds key encryption via Microsoft.AspNetCore.DataProtection
IdentityServer3 - Cache.Redis is a library that includes the implementation for client, scope, and user stores using Redis as distribuited cache system.
MongoDb persistence for Thinktecture's Identityserver
MongoDb admin persistence for Thinktecture's Identityserver